Used 2018 Audi S5 Price in the US
A used 2018 Audi S5 in the US typically lists for $21,574–$28,990, with a median asking price of $24,993 across 186 active US dealer listings (as of 2026-08-30). The cheapest one listed right now is $13,791, a 2018 Quattro Prestige Technik in Milford, CT — below 95% of the market, so expect an older model year, a base trim or high mileage.
- Typical range
- $21,574 – $28,990
- Median
- $24,993
- Cheapest 5%
- under $17,624
- Cheapest listed now
- $13,791
Browse by model year
cheapest per year- All years
- 2026 · from $68,361
- 2025 · from $40,341
- 2024 · from $34,000
- 2023 · from $29,995
- 2022 · from $30,375
- 2021 · from $25,509
- 2020 · from $19,700
- 2019 · from $15,496
- 2018 · from $13,791
- 2017 · from $12,500
- 2016 · from $10,590
- 2015 · from $9,500
- 2014 · from $10,899
- 2013 · from $7,990
- 2012 · from $5,950
- 2011 · from $3,967
- 2010 · from $7,672
- 2009 · from $7,345
- 2008 · from $9,490
Cheapest 10 listed right now
ranked by price-
$13,7912018 Audi S5 Quattro Prestige Technik158,584 mi · Milford, CT · Car Central MilfordView listing →
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$14,4952018 Audi S5 Quattro Prestige Technik154,808 mi · Los Angeles, CA · Best Price Auto LLCView listing → -
$15,2302018 Audi S5 Quattro Prestige Technik115,574 mi · Hollywood, FL · Haims MotorsView listing →
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$15,9992018 Audi S5 Quattro Prestige Technik150,400 mi · Cincinnati, OH · Ram MotorsView listing → -
$15,9992018 Audi S5 Quattro Premium Plus119,900 mi · Worcester, MA · Vix Auto SalesView listing → -
$16,4802018 Audi S5 Quattro Prestige Technik101,100 mi · Diamond Bar, CA · Keylane Auto BrokersView listing → -
$16,9982018 Audi S5 Quattro Premium Plus127,000 mi · Buford, GA · Atlanta Luxury MotorsView listing → -
$17,0792018 Audi S5 Quattro Premium Plus124,230 mi · Santa Clara, CA · Stevens Creek BMWView listing → -
$17,5002018 Audi S5 Quattro Prestige Technik136,410 mi · Mount Juliet, TN · NextGen Motors IncView 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 S5 asks $21,574–$28,990. Cars this far under usually carry an older model year, a base trim or high mileage.
Deals on the map
10 pinnedFAQ
How much does a used 2018 Audi S5 cost?
A used 2018 Audi S5 in the US typically lists for $21,574 to $28,990, with a median asking price of $24,993 across 186 active US dealer listings. Nine in ten are priced between $17,624 and $32,998 (as of 2026-08-30, source: UnderMarket Cars).
Is $25,000 a good price for a used 2018 Audi S5?
That sits at about the market median ($24,993) for a used 2018 Audi S5. Under $21,574 puts you in the cheapest quarter of active US listings and under $17,624 in the cheapest 5%; above $32,998 is the priciest 5% (as of 2026-08-30).
What is the cheapest used 2018 Audi S5 for sale right now?
$13,791 — a 2018 Audi S5 Quattro Prestige Technik in Milford, CT, $11,202 under the median (as of 2026-08-30).
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?
UnderMarket Cars refreshes US dealer listings continuously and re-generates this used 2018 Audi S5 price page at least twice a day. The data date shown on this page is 2026-08-30.
Explore more
Prices updated 2026-08-30. Data covers active dealer listings across the USA.