How much does the 2018 Audi S5 cost?

Prices have softened 8.30% compared to this time last year, making it a favorable time to shop this model year.

With 103 listings available, you have a modest amount of inventory to compare across price and condition.

If you find a listing below $23,596.42, that's toward the low end of the year-round range and worth acting on quickly.

Is the 2018 Audi S5 a good car?

Yes — the 2018 Audi S5 earns a 4.9/5 user rating, which points to very strong owner satisfaction. Owners consistently praise its powerful performance, sleek styling, and advanced technology features. Many also like the convertible top and smooth ride, though some mention the sound system and limited trunk space as tradeoffs. With 30.1% of listings marked as good or great deals, you still have room to shop selectively.

Is the 2018 Audi S5 reliable?

Owners rate it 4.9/5, a strong signal of long-term satisfaction.

The review summary also points to a car that owners describe as powerful, smooth, and enjoyable to live with over time, which supports the idea that it can be a dependable choice when maintained well. For used buyers, the main long-term ownership risk is less about the driving experience and more about finding a well-kept example with the right maintenance history.

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

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 pre-purchase inspection, especially on bodywork, convertible-top operation if equipped, and any signs of uneven wear or repair quality. Focus on overall condition first, because the best used example will usually be the one with the cleanest history and the most consistent maintenance record.

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

This is a moderate, selective buyer's market, so you can shop carefully without feeling rushed.

• Deal availability: 30.1% of listings are priced as good or great deals.
• Inventory: There are 103 listings available.
• Price trend: Prices have softened 8.30% compared with last year.
• Clean inventory: 67.0% of listings are accident-free.

If you find a listing below $23,596.42, that's toward the low end of the year-round range and worth acting on quickly.

What is the 2018 Audi S5's resale value?

The current average of $25,084 sits slightly below last year's $27,355.

That price movement suggests the market has softened, which can matter if you're planning to sell in the future. If you buy at a competitive price and keep the car in strong condition, you may be better positioned to limit depreciation pressure. A well-kept example with clean history should also be easier to market when it's time to move on.

Vehicles with strong owner satisfaction ratings, like this model year's 4.9/5, tend to retain buyer demand, which supports resale value over time.

Should I buy a 2018 Audi S5 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:

• 30.1% 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 8.30% compared with last year.
• Owners rate it 4.9/5 — a strong satisfaction signal.

The bottom line:

The 2018 is a solid choice if you want a well-liked S5 and you're willing to shop carefully for condition and history. If your priority is getting the strongest value, this year looks especially appealing when you can find a clean, well-priced example near the lower end of the market. If you're more price-sensitive, it makes sense to compare nearby years and focus on whichever one gives you the best combination of condition, mileage, and asking price.

These recommendations are based on CarGurus' proprietary market data from August 28, 2026, CarGurus experts' opinions, and generative AI.