Used 2020 Lexus IS for Sale nearPortland, OR
Shop with transparent pricing.
Only show listings that include dealer fees- Year:
- 2021
- Make:
- Lexus
- Model:
- IS
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- All-Wheel Drive
- Engine:
- 260 hp 3.5L V6
- Exterior color:
- Cloudburst Gray[xccloudburst]
- Combined gas mileage:
- 22 MPG
- Fuel type:
- Gasoline
- Interior color:
- Glazed Caramel Nuluxe® With Black Metallic Trim
- Transmission:
- Automatic
- Mileage:
- 63,751
- Stock #:
- G26385B
- VIN:
- JTHC81F21M5046562
![Cloudburst Gray[xccloudburst] 2021 Lexus IS Sedan All-Wheel Drive Automatic](https://static.cargurus.com/images/forsale/2026/09/18/13/19/2021_lexus_is-pic-2424273498442068254-1024x768.jpeg?io=true&width=640&height=480&fit=bounds&format=jpg&auto=webp)
Sponsored Listing
2021 Lexus IS
300 AWD
63,751 mi
$33,150
- Year:
- 2021
- Make:
- Lexus
- Model:
- IS
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- All-Wheel Drive
- Engine:
- 260 hp 3.5L V6
- Exterior color:
- Cloudburst Gray[xccloudburst]
- Combined gas mileage:
- 22 MPG
- Fuel type:
- Gasoline
- Interior color:
- Glazed Caramel Nuluxe® With Black Metallic Trim
- Transmission:
- Automatic
- Mileage:
- 63,751
- Stock #:
- G26385B
- VIN:
- JTHC81F21M5046562
![Cloudburst Gray[xccloudburst] 2021 Lexus IS Sedan All-Wheel Drive Automatic](https://static.cargurus.com/images/forsale/2026/09/18/13/19/2021_lexus_is-pic-2424273498442068254-1024x768.jpeg?io=true&width=640&height=480&fit=bounds&format=jpg&auto=webp)
2021 Lexus IS
300 AWD
63,751 mi
$33,150
- Year:
- 2019
- Make:
- Lexus
- Model:
- IS
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- Rear-Wheel Drive
- Engine:
- 241 hp 2L I4
- Exterior color:
- Pearl
- Combined gas mileage:
- 25 MPG
- Fuel type:
- Gasoline
- Interior color:
- Black
- Transmission:
- Automatic
- Mileage:
- 52,285
- Stock #:
- 70232712
- VIN:
- JTHBA1D29K5099414

2019 Lexus IS
300 RWD
52,285 mi
$26,747
- Year:
- 2021
- Make:
- Lexus
- Model:
- IS
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- Rear-Wheel Drive
- Engine:
- 311 hp 3.5L V6
- Exterior color:
- Silver
- Combined gas mileage:
- 24 MPG
- Fuel type:
- Gasoline
- Interior color:
- Black
- Transmission:
- Automatic
- Mileage:
- 63,185
- Stock #:
- 70158952
- VIN:
- JTHGZ1B28M5045025

2021 Lexus IS
350 F Sport RWD
63,185 mi
$36,747
- Year:
- 2019
- Make:
- Lexus
- Model:
- IS
- Body type:
- Sedan
- Engine:
- 260 hp 3.5L V6
- Exterior color:
- Gray
- Fuel type:
- Gasoline
- Interior color:
- Black
- Transmission:
- Automatic
- Mileage:
- 78,844
- Stock #:
- 29105509
- VIN:
- JTHC81D23K5035305

2019 Lexus IS
78,844 mi
$33,997
- Year:
- 2019
- Make:
- Lexus
- Model:
- IS
- Body type:
- Sedan
- Exterior color:
- Black
- Interior color:
- Brown (Tan)
- Transmission:
- 6-Speed Automatic
- Mileage:
- 64,566
- Stock #:
- 5982
- VIN:
- JTHC81D20K5036881

2019 Lexus IS
300 Luxury AWD
64,566 mi
$29,930
- Year:
- 2019
- Make:
- Lexus
- Model:
- IS
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- Rear-Wheel Drive
- Engine:
- 241 hp 2L I4
- Exterior color:
- White Pearl
- Fuel type:
- Gasoline
- Interior color:
- Black
- Transmission:
- 8-Speed Dual Clutch
- Mileage:
- 97,947
- Stock #:
- B11052
- VIN:
- JTHBA1D2XK5087756

2019 Lexus IS
300 RWD
97,947 mi
$22,532
- Year:
- 2019
- Make:
- Lexus
- Model:
- IS
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- Rear-Wheel Drive
- Engine:
- 241 hp 2L I4
- Exterior color:
- Red
- Combined gas mileage:
- 25 MPG
- Fuel type:
- Gasoline
- Interior color:
- Blue
- Transmission:
- Automatic
- Mileage:
- 86,326
- Stock #:
- 27956888
- VIN:
- JTHBA1D27K5087911

2019 Lexus IS
300 RWD
86,326 mi
$24,697
- Year:
- 2021
- Make:
- Lexus
- Model:
- IS
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- Rear-Wheel Drive
- Engine:
- 311 hp 3.5L V6
- Exterior color:
- Gray
- Combined gas mileage:
- 24 MPG
- Fuel type:
- Gasoline
- Interior color:
- Black
- Transmission:
- Automatic
- Mileage:
- 24,209
- Stock #:
- 70133746
- VIN:
- JTHGZ1B23M5047197

2021 Lexus IS
350 F Sport RWD
24,209 mi
$41,547
- Year:
- 2019
- Make:
- Lexus
- Model:
- IS
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- All-Wheel Drive
- Engine:
- 260 hp 3.5L V6
- Exterior color:
- White
- Combined gas mileage:
- 22 MPG
- Fuel type:
- Gasoline
- Interior color:
- Red
- Transmission:
- 6-Speed Automatic
- Mileage:
- 120,454
- Stock #:
- 1867
- VIN:
- JTHC81D23K5034123

-$1,333
2019 Lexus IS
300 AWD
120,454 mi
$24,133
$22,800
- Year:
- 2020
- Make:
- Lexus
- Model:
- IS
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- Rear-Wheel Drive
- Engine:
- 241 hp 2L I4
- Exterior color:
- White
- Combined gas mileage:
- 25 MPG
- Fuel type:
- Gasoline
- Interior color:
- Black
- Transmission:
- Automatic
- Mileage:
- 67,909
- Stock #:
- 70226823
- VIN:
- JTHAA1D2XL5108358

2020 Lexus IS
300 RWD
67,909 mi
$25,547
- Year:
- 2020
- Make:
- Lexus
- Model:
- IS
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- Rear-Wheel Drive
- Engine:
- 241 hp 2L I4
- Exterior color:
- Silver
- Combined gas mileage:
- 25 MPG
- Fuel type:
- Gasoline
- Interior color:
- Gray
- Transmission:
- Automatic
- Mileage:
- 61,171
- Stock #:
- 70232319
- VIN:
- JTHAA1D25L5104203

2020 Lexus IS
300 RWD
61,171 mi
$26,997
- Year:
- 2019
- Make:
- Lexus
- Model:
- IS
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- Rear-Wheel Drive
- Engine:
- 241 hp 2L I4
- Exterior color:
- Black
- Fuel type:
- Gasoline
- Interior color:
- Red
- Transmission:
- 8-Speed Dual Clutch
- Mileage:
- 93,970
- Stock #:
- 090886
- VIN:
- JTHBA1D25K5090886

2019 Lexus IS
300 RWD
93,970 mi
$22,891
CarGurus Analysis:
2020 Lexus IS
With 32 currently listed for sale near Portland, OR and an average price of $27,995, 56.3% of 2020 Lexus IS models for sale on CarGurus are rated as good or great deals.
Favorably reviewed: Owners rated the 2020 Lexus IS 4.5 / 5 stars.
100.0% of 2020 Lexus IS models on CarGurus are accident free.
- Year:
- 2020
- Make:
- Lexus
- Model:
- IS
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- All-Wheel Drive
- Engine:
- 260 hp 3.5L V6
- Exterior color:
- White
- Combined gas mileage:
- 21 MPG
- Fuel type:
- Gasoline
- Interior color:
- Brown (Beige)
- Transmission:
- 6-Speed Automatic
- Mileage:
- 93,460
- Stock #:
- 962
- VIN:
- JTHA81F2XL5042421

2020 Lexus IS
300 AWD
93,460 mi
$28,952
- Year:
- 2021
- Make:
- Lexus
- Model:
- IS
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- Rear-Wheel Drive
- Engine:
- 311 hp 3.5L V6
- Exterior color:
- Black
- Combined gas mileage:
- 24 MPG
- Fuel type:
- Gasoline
- Interior color:
- Red
- Transmission:
- 8-Speed Automatic
- Mileage:
- 60,612
- Stock #:
- 14628
- VIN:
- JTHGZ1B25M5045905

2021 Lexus IS
350 F Sport RWD
60,612 mi
$36,523
- Year:
- 2021
- Make:
- Lexus
- Model:
- IS
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- Rear-Wheel Drive
- Engine:
- 311 hp 3.5L V6
- Exterior color:
- Cloudburst Gray
- Combined gas mileage:
- 24 MPG
- Fuel type:
- Gasoline
- Interior color:
- Black w/Black
- Transmission:
- Automatic
- Mileage:
- 44,345
- Stock #:
- 038020
- VIN:
- JTHGZ1B27M5038020

2021 Lexus IS
350 F Sport RWD
44,345 mi
$39,537
- Year:
- 2019
- Make:
- Lexus
- Model:
- IS
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- Rear-Wheel Drive
- Engine:
- 241 hp 2L I4
- Exterior color:
- Gray (Liquid Platinum)
- Fuel type:
- Gasoline
- Interior color:
- Black
- Transmission:
- 8-Speed Dual Clutch
- Mileage:
- 99,245
- Stock #:
- 1040B
- VIN:
- JTHBA1D25K5098907

2019 Lexus IS
300 RWD
99,245 mi
$22,910
- Year:
- 2020
- Make:
- Lexus
- Model:
- IS
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- Rear-Wheel Drive
- Engine:
- 241 hp 2L I4
- Exterior color:
- White
- Fuel type:
- Gasoline
- Transmission:
- 8-Speed Dual Clutch
- Mileage:
- 88,406
- Stock #:
- 107190
- VIN:
- JTHGA1D21L5107190

2020 Lexus IS
300 RWD
88,406 mi
No Price Listed
- Year:
- 2020
- Make:
- Lexus
- Model:
- IS
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- Rear-Wheel Drive
- Engine:
- 311 hp 3.5L V6
- Exterior color:
- Black
- Combined gas mileage:
- 24 MPG
- Fuel type:
- Gasoline
- Interior color:
- Rioja Red w/Dark Gray Streamline Trim
- Transmission:
- 8-Speed Automatic
- Mileage:
- 80,984
- Stock #:
- B3394
- VIN:
- JTHGZ1B23L5035842

2020 Lexus IS
350 RWD
80,984 mi
$28,245
- Year:
- 2021
- Make:
- Lexus
- Model:
- IS
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- All-Wheel Drive
- Engine:
- 311 hp 3.5L V6
- Exterior color:
- White
- Combined gas mileage:
- 22 MPG
- Fuel type:
- Gasoline
- Interior color:
- Red
- Transmission:
- Automatic
- Mileage:
- 47,141
- Stock #:
- M5021286
- VIN:
- JTHGZ1E2XM5021286

2021 Lexus IS
350 F Sport AWD
47,141 mi
$48,144
- Year:
- 2021
- Make:
- Lexus
- Model:
- IS
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- All-Wheel Drive
- Engine:
- 311 hp 3.5L V6
- Exterior color:
- White
- Combined gas mileage:
- 22 MPG
- Fuel type:
- Gasoline
- Interior color:
- Red
- Transmission:
- Automatic
- Mileage:
- 68,379
- Stock #:
- M5018473
- VIN:
- JTHGZ1E25M5018473

2021 Lexus IS
350 F Sport AWD
68,379 mi
$45,584
- Year:
- 2021
- Make:
- Lexus
- Model:
- IS
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- All-Wheel Drive
- Engine:
- 260 hp 3.5L V6
- Exterior color:
- Black
- Combined gas mileage:
- 22 MPG
- Fuel type:
- Gasoline
- Interior color:
- Red
- Transmission:
- Automatic
- Mileage:
- 28,279
- Stock #:
- M5044823
- VIN:
- JTHC81F24M5044823

2021 Lexus IS
300 AWD
28,279 mi
$44,893
- Year:
- 2021
- Make:
- Lexus
- Model:
- IS
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- Rear-Wheel Drive
- Engine:
- 311 hp 3.5L V6
- Exterior color:
- Infrared
- Combined gas mileage:
- 24 MPG
- Fuel type:
- Gasoline
- Interior color:
- Black w/Black Geometric Trim
- Transmission:
- Automatic
- Mileage:
- 122,043
- Stock #:
- SV7080
- VIN:
- JTHGZ1B2XM5041221

2021 Lexus IS
350 F Sport RWD
122,043 mi
$36,752
CarGurus Analysis: 2020 Lexus IS

Summary
With 32 currently listed for sale near Portland, OR and an average price of $27,995, 56.3% of 2020 Lexus IS models for sale on CarGurus are rated as good or great deals.
Favorably reviewed: Owners rated the 2020 Lexus IS 4.5 / 5 stars.
100.0% of 2020 Lexus IS models on CarGurus are accident free.
Why it stands out
The 2020 Lexus IS stands out as a compact luxury sedan that leans into driving enjoyment while staying relatively approachable in price. Lexus positions the IS as a fun-to-drive sports sedan with compact proportions, and it is also described as the brand’s entry-level model, which helps explain its appeal to younger buyers. At the same time, it is not trying to be the roomiest choice in the class: the back seat is really tight, and the car is also noted for not having much cargo space.
For this model year, the IS sits within the third generation, which brought a radically new design, better interior space, and a revamped infotainment system. The generation also added standard luxury features such as passive entry, push-button start, a 10-way power adjustable driver’s seat, a power moonroof, a 13-speaker premium audio system, built-in telematics, and hill-start assist, along with available safety features including automatic high beams, lane departure alert, blind spot monitoring, and rear-cross-traffic alert. By 2020, Amazon Alexa and smartwatch integration had arrived, and the IS F Black Line Special Edition was offered with unique design elements and a limited 900-unit production run.
The 2020 Lexus IS is also appealing because it offers a broad range of powertrain choices within the generation, including a fuel-efficient inline-four turbo and available V6 and V8 options. That said, the model’s drawbacks remain part of its character: the pros and cons list calls out poor fuel economy, cramped back seats, and limited cargo space.
Other model years to consider
- Average price: $15,989
- Good/great deal percentage: 22.0%
- User rating: 4.6 / 5
- Total listings: 59
- Average price: $38,322
- Good/great deal percentage: 37.7%
- User rating: 5 / 5
- Total listings: 53
- Average price: $17,295
- Good/great deal percentage: 25.5%
- User rating: 4.78 / 5
- Total listings: 51
This analysis is based on CarGurus' proprietary market data from September 21, 2026, CarGurus experts' opinions, and generative AI.
*CarGurus meticulously monitors the prices of millions of pre-owned vehicle listings, offering users precise and up-to-date market insights. Historical pricing data excludes any additional dealer fees as of May 3, 2026.
4.5 Overall rating
Filter by rating
Malena M
Reviewed a 2020 Lexus IS on Dec 3, 2023
Great value, roomy luxurious, and sporty. Nimble handling, smooth ride.
Sean M
Reviewed a 2020 Lexus IS on Aug 14, 2023
Beautiful car nice luxury ride and dependable and comfortable. Price is in line with other luxury brands.
2020 Lexus IS Trims
| Trim type | MSRP |
|---|---|
| 350 RWD | $42,180 |
| 300 AWD | $41,010 |
| 300 RWD | $38,560 |
| 350 AWD | $44,345 |
*CarGurus meticulously monitors the prices of millions of pre-owned vehicle listings, offering users precise and up-to-date market insights. Historical pricing data excludes any additional dealer fees as of May 3, 2026.
2020 Lexus IS Price Trends
CarGurus tracks the prices of millions of used car listings every year. See how the average price of 2020 Lexus IS prices has changed over time.
See more price trends2020 Lexus IS Pricing Analysis: Portland, OR Market Report
Pricing by Trim Packages
Key Insights
- RWD vs AWD Supply: The 300 RWD trim leads in inventory with 32 listings, indicating a preference for rear-wheel drive in the local market.
- Price Range Across Trims: The 350 AWD trim has the highest MSRP at $44,345, reflecting its premium features and capabilities.
- Feature-Rich Offerings: All trims include desirable features such as Bluetooth, Navigation, and Adaptive Cruise Control, appealing to a tech-savvy consumer base.
Trim-Level Details
| Trim | Listings | MSRP | Drivetrain | Engine |
|---|---|---|---|---|
| 300 RWD | 32 | $38,560 | RWD | 2.0L 241 hp I4 |
| 300 AWD | 30 | $41,010 | AWD | 3.5L 260 hp V6 |
| 350 RWD | 13 | $42,180 | RWD | 3.5L 311 hp V6 |
| 350 AWD | 6 | $44,345 | AWD | 3.5L 311 hp V6 |
Pricing Analysis by Model Year
Key Insights
- New Models at a Premium: The 2024 Lexus IS is priced at $46,990, which is 16.5% above MSRP, indicating strong demand for the latest model.
- Depreciation Trends: The 2016 Lexus IS shows significant depreciation, with an average price of $17,993, down 51.8% from MSRP.
- Best Value Years: The 2022 model is priced at $38,716, only -6.4% below MSRP, making it a compelling option for buyers seeking a balance of price and features.
Model Year Pricing
| Model Year | Original MSRP | Avg Price | Price vs MSRP |
|---|---|---|---|
| 2024 | $40,085 | $46,990 | +16.5% |
| 2023 | $40,085 | $42,758 | +6.7% |
| 2022 | $39,125 | $38,716 | -1.0% |
| 2021 | $39,050 | $33,000 | -15.5% |
| 2018 | $38,210 | $27,654 | -27.7% |
| 2017 | $37,825 | $28,755 | -23.9% |
| 2016 | $37,325 | $17,993 | -51.8% |
| 2015 | $36,550 | $13,995 | -61.7% |
| 2014 | $36,100 | $17,044 | -52.8% |
These recommendations are based on CarGurus' proprietary market data from September 16, 2026, CarGurus experts' opinions, and generative AI.
*CarGurus meticulously monitors the prices of millions of pre-owned vehicle listings, offering users precise and up-to-date market insights. Historical pricing data excludes any additional dealer fees as of May 3, 2026.
How much does the 2020 Lexus IS cost?
| Metric | Value |
|---|---|
| Current Average Price | $27,703 |
| Year-Round Low | $25,871 |
| Year-Round High | $28,415 |
| Average Price a Year Ago | $28,157 |
| Change vs. Last Year | −1.61% |
Prices have softened 1.61% compared to this time last year, making it a favorable time to shop this model year.
There are 470 listings available, which gives you a reasonable amount of inventory to compare before you buy.
Is the 2020 Lexus IS a good car?
Yes — the 4.5/5 user rating points to strong owner satisfaction. The 2020 Lexus IS is positioned as a compact luxury sedan that leans into driving enjoyment, and it is also described as the brand’s entry-level model, which helps explain its appeal to younger buyers. It is not the roomiest choice in the class, though, since the back seat is really tight and cargo space is limited.
That makes it a better fit if you want a fun-to-drive luxury sedan and can live with modest practicality. 33.4% of listings are priced as good or great deals, which gives you some room to shop selectively.
Is the 2020 Lexus IS reliable?
Owners rate it 4.5/5, a strong signal of long-term satisfaction.
The 2020 Lexus IS is described as a compact luxury sedan with a strong emphasis on driving enjoyment, and it also carries the kind of standard luxury and convenience features that help it feel well equipped. Its broad powertrain range adds flexibility, with an inline-four turbo plus available V6 and V8 options.
For used buyers, the main long-term ownership risk is less about the car’s character and more about finding one that has been maintained well and hasn’t been worn down by hard use.
What should I look for when buying a used 2020 Lexus IS?
At 67% accident-free, a meaningful share of listings has prior incidents — history verification is especially important.
You should start with a vehicle history report so you can separate clean examples from cars with prior damage. After that, prioritize a thorough inspection of body panels, paint consistency, and signs of repair, since condition matters more when you are shopping a sporty luxury sedan. It is also smart to focus on how the cabin and cargo area have held up, because this model is already known for tight rear seating and limited space.
Is now a good time to buy a used 2020 Lexus IS?
This looks like a moderate, selective buyer’s market, so you can shop patiently but should move quickly on the right car.
- Deal availability: 33.4% of listings are priced as good or great deals.
- Inventory: There are 470 listings available.
- Price trend: Prices have softened 1.61% compared with last year.
- Clean inventory: 67.0% of listings are accident-free.
If you find a listing below $25,871, that's toward the low end of the year-round range and worth acting on quickly.
What is the 2020 Lexus IS's resale value?
The current average of $27,703 sits slightly below last year's $28,157.
That kind of softening suggests the market has become a bit more favorable for buyers, but it can also mean sellers need to price carefully to stay competitive. If you buy well now, you may have a better chance of limiting depreciation pressure later, especially if you choose a clean, well-kept example. Strong condition and a desirable configuration should matter more when it comes time to resell.
Vehicles with strong owner satisfaction ratings, like this model year's 4.5/5, tend to retain buyer demand, which supports resale value over time.
Should I buy a 2020 Lexus IS or consider a different year?
If you're weighing the 2020 against nearby model years, here's how to think about it:
Choose the 2020 if:
- 33.4% of listings are priced as good or great deals.
- At 67% accident-free, a meaningful share of listings has prior incidents — history verification is especially important.
- Price trend: Prices have softened 1.61% compared with last year.
- Owners rate it 4.5/5 — a strong satisfaction signal.
Consider the 2021 if:
- At $34,775, the 2021 costs more than the current year's $27,703 average.
- It brings a new generation with sharper styling and a more purpose-built driving character.
The bottom line: If you want the better value, the 2020 is the stronger starting point because it combines a lower average price with solid owner satisfaction and decent deal availability. If you are willing to spend more for a newer-generation feel and a more focused performance character, the 2021 is the better upgrade path. For price-sensitive buyers, the 2020 is the practical choice; for shoppers prioritizing the newest design direction, the 2021 deserves a look.
These recommendations are based on CarGurus' proprietary market data from September 15, 2026, CarGurus experts' opinions, and generative AI.
*CarGurus meticulously monitors the prices of millions of pre-owned vehicle listings, offering users precise and up-to-date market insights. Historical pricing data excludes any additional dealer fees as of May 3, 2026.
Relevant articles

The Most Reliable Luxury Cars of 2026
Luxury cars give you the best of most things but which are the most reliable luxury cars you can buy? Our guide has all the details.

Best Lexus Deals in September 2026
Leasing a Lexus can be a great way to get into a new car from one of the most popular luxury brands at a more affordable monthly rate. Here are the best deals we've found this month on Lexus vehicles.

Lexus IS Buying Guide: Cost, Reliability, and the Best Years to Buy
Discover the ultimate buying guide for purchasing a used Lexus IS covering each generation since 2001. Whether you're a first-time buyer or a Lexus enthusiast, this comprehensive overview will help you research your next pre-owned Lexus IS.