Used 2018 Audi S5 Sportback for SaleNationwide

How much does the 2018 Audi S5 Sportback cost?

Prices have softened 9.58% compared to this time last year, making it a favorable time to shop this model year.

There are 185 listings available, which suggests you have a reasonable amount of inventory to compare.

Is the 2018 Audi S5 Sportback a good car?

Yes — the 4.83/5 user rating points to strong owner satisfaction. Owners consistently praise its eye-catching design, impressive performance, fast speed, and luxurious features, including comfortable massage chairs. The market also shows 39.5% of listings as good or great deals, which gives you some room to shop selectively.

Is the 2018 Audi S5 Sportback reliable?

Owners rate it 4.83/5, a strong signal of long-term satisfaction.

The owner feedback also points to a dependable-feeling ownership experience, with praise centered on performance and comfort rather than recurring major complaints. Some drivers do mention minor startup hiccups and inconsistencies in light features, so a careful pre-purchase inspection still matters. For used buyers, the main long-term ownership risk is ending up with a car that has small but annoying electrical or startup issues that were not caught before purchase.

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

At 70.8% accident-free, a meaningful share of listings has prior incidents — history verification is especially important.

You should start with a vehicle history report and confirm whether any prior damage was repaired properly. Put inspection priority on bodywork, panel alignment, lighting operation, and startup behavior, since those are the kinds of issues that can hide in a used performance car. It also makes sense to focus on overall condition and maintenance consistency, because a clean-looking listing is not the same as a well-documented one.

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

This is a moderate buyer's market, so you can be selective without expecting every listing to be a bargain.

• Deal availability: 39.5% of listings are priced as good or great deals.
• Inventory: There are 185 listings available.
• Price trend: Prices have softened 9.58% compared with last year.
• Clean inventory: 70.8% of listings are accident-free.

If you find a listing below $23,796, 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 $24,009 sits slightly below last year's $26,555.

That price movement suggests the model has already given back some value, which can be helpful if you are buying now but less ideal if you are planning to sell soon. If the market stays soft, future resale gains may be limited unless your car stands out for condition, mileage, and documentation. Strong presentation and a clean history will matter more when it is time to list it again.

Vehicles with strong owner satisfaction ratings, like this model year's 4.83/5, 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:

• 39.5% of listings are priced as good or great deals.
• At 70.8% accident-free, a meaningful share of listings has prior incidents — history verification is especially important.
• Price trend: Prices have softened 9.58% compared with last year.
• Owners rate it 4.83/5 — a strong satisfaction signal.

The bottom line: If you want the best balance of value and owner satisfaction, the 2018 is a sensible place to focus, especially because prices have eased and there are still enough listings to compare. If you are especially price-sensitive, keep an eye out for the lowest-priced examples and be ready to move quickly when a clean, well-documented car appears.

These recommendations are based on CarGurus' proprietary market data from September 22, 2026, CarGurus experts' opinions, and generative AI.