Used 2018 Audi A5 Price in the US
A used 2018 Audi A5 in the US typically lists for $15,995–$21,337, with a median asking price of $18,258 across 399 active US dealer listings (as of 2026-10-16). The cheapest one listed right now is $6,996, a 2018 Quattro Prestige Technik in Hollywood, FL — below 95% of the market, so expect high mileage, a base trim or a branded title — check the vehicle history.
- Typical range
- $15,995 – $21,337
- Median
- $18,258
- Cheapest 5%
- under $12,488
- Cheapest listed now
- $6,996
Browse by model year
typical price per yearCheapest 10 listed right now
ranked by price-
$6,9962018 Audi A5 Quattro Prestige Technik176,363 mi · Hollywood, FL · International Auto Brokers IncView listing →
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$8,9952018 Audi A5 Quattro Premium Komfort172,980 mi · Forest Hills, NY · Sunrise ChevroletView listing → -
$9,7772018 Audi A5 Quattro Premium Plus121,619 mi · Alexandria, VA · CarPlug of AlexandriaView listing → -
$9,9952018 Audi A5 S Line Quattro178,811 mi · San Antonio, TX · Premier Auto Motor ImportsView listing →
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$10,5002018 Audi A5 Quattro Prestige147,573 mi · Alexandria, VA · CarPlug of AlexandriaView listing → -
$10,8552018 Audi A5 S Line Quattro160,164 mi · Arlington Heights, IL · Autos of ChicagoView listing → -
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$10,9002018 Audi A5 Quattro Premium Plus122,108 mi · Upper Marlboro, MD · Unlimited Auto SalesView listing →
These are the bottom of the market, not the going rate — every one is priced below 95% of active listings. A typical used 2018 Audi A5 asks $15,995–$21,337. Cars this far under: expect high mileage, a base trim or a branded title — check the vehicle history.
Deals on the map
10 pinnedFAQ
How much does a used 2018 Audi A5 cost?
A used 2018 Audi A5 in the US typically lists for $15,995 to $21,337, with a median asking price of $18,258 across 399 active US dealer listings. Nine in ten are priced between $12,488 and $26,128 (as of 2026-10-16, source: UnderMarket Cars).
Is $18,000 a good price for a used 2018 Audi A5?
That sits at about the market median ($18,258) for a used 2018 Audi A5. Under $15,995 puts you in the cheapest quarter of active US listings and under $12,488 in the cheapest 5%; above $26,128 is the priciest 5% (as of 2026-10-16).
What is the cheapest used 2018 Audi A5 for sale right now?
$6,996 — a 2018 Audi A5 Quattro Prestige Technik in Hollywood, FL, $11,262 under the median (as of 2026-10-16).
Are these MSRP or real asking prices?
Real asking prices from active US dealer listings, deduplicated by VIN — not manufacturer MSRP. They already reflect dealer discounts, and they exclude tax, title, registration and dealer fees.
How often are prices updated?
The listing data behind UnderMarket Cars is rebuilt from live US dealer inventory every few hours, and this used 2018 Audi A5 page is regenerated from it when it is requested. The figures on this page are from 2026-10-16.
Explore more
Prices updated 2026-10-16. Data covers active dealer listings across the USA.