Used 2018 Audi S5 Sportback for Sale nearMadison, WI

How much does the 2018 Audi S5 Sportback cost?

Prices have softened 9.18% compared to this time last year, making it a favorable time to shop this model year.

There are 206 listings available, which gives you a solid amount of inventory to compare.

Is the 2018 Audi S5 Sportback a good car?

Yes — the 2018 Audi S5 Sportback earns a 4.8/5 user rating, which points to strong owner satisfaction. Owners consistently praise its eye-catching design, impressive performance, fast speed, and luxurious features, including comfortable massage chairs. The main tradeoff is that some drivers mention minor startup hiccups and occasional inconsistencies with light features. With 39.8% of listings marked as good or great deals, you have a meaningful chance to find a competitively priced example.

Is the 2018 Audi S5 Sportback reliable?

Owners rate it 4.8/5, a strong signal of long-term satisfaction.

The owner feedback points to a car that many drivers find dependable enough to enjoy over time, especially because the praise centers on performance, comfort, and overall satisfaction. At the same time, the mention of minor startup hiccups and light-feature inconsistencies suggests you should pay attention to how the car behaves in daily use. For used buyers, that means long-term ownership risk looks manageable, but condition and maintenance history still matter.

What should I look for when buying a used 2018 Audi S5 Sportback?

At 68.9% accident-free, a meaningful share of listings has prior incidents — history verification is especially important.

You should run a vehicle history report before you commit, since prior damage can affect both value and future repair risk. A pre-purchase inspection should focus on startup behavior, electrical functions, and any signs that the car’s luxury features are not working consistently. You’ll also want to compare condition carefully across listings, because the best examples are likely to justify the strongest prices.

Is now a good time to buy a used 2018 Audi S5 Sportback?

This looks like a moderate, selective buyer’s market, so you can shop with some leverage if you’re patient and focused.

• Deal availability: 39.8% of listings are priced as good or great deals.
• Inventory: There are 206 listings available.
• Price trend: Prices have softened 9.18% compared with last year.
• Clean inventory: 68.9% of listings are accident-free.

If you find a listing below $23,283, that's toward the low end of the year-round range and worth acting on quickly.

What is the 2018 Audi S5 Sportback's resale value?

The current average of $23,292 sits slightly below last year's $25,645.

That softer pricing can help you buy more affordably now, but it also means a future sale may face a more competitive market if prices stay under pressure. If you plan to resell later, condition will matter a lot, because cleaner examples tend to stand out when shoppers compare similar listings. Strong demand for well-reviewed cars can help support value, but the current trend suggests you should be realistic about future appreciation.

Vehicles with strong owner satisfaction ratings, like this model year's 4.8/5, tend to retain buyer demand, which supports resale value over time.

Should I buy a 2018 Audi S5 Sportback or consider a different year?

If you're weighing the 2018 against nearby model years, here's how to think about it:

Choose the 2018 if:

• 39.8% of listings are priced as good or great deals.
• At 68.9% accident-free, a meaningful share of listings has prior incidents — history verification is especially important.
• Price trend: Prices have softened 9.18% compared with last year.
• Owners rate it 4.8/5 — a strong satisfaction signal.

The bottom line: You should start with the 2018 if you want a model year with strong owner satisfaction, a lower average price, and enough inventory to compare options. If you’re especially price-sensitive, this year looks appealing because the market has softened and there are still plenty of listings to shop. If you want the best possible condition, be selective and prioritize accident-free examples with clean history reports.

How does the 2018 Audi S5 Sportback compare to the 2018 Porsche Panamera?

These recommendations are based on CarGurus' proprietary market data from November 10, 2026, CarGurus experts' opinions, and generative AI.