Used 2018 Audi S4 Price in the US
A used 2018 Audi S4 in the US typically lists for $21,330–$27,991, with a median asking price of $23,895 across 68 active US dealer listings (as of 2026-08-31). The cheapest one listed right now is $14,999, a 2018 Quattro Premium Plus in Chantilly, VA — below 95% of the market, so expect an older model year, a base trim or high mileage.
- Typical range
- $21,330 – $27,991
- Median
- $23,895
- Cheapest 5%
- under $18,369
- Cheapest listed now
- $14,999
Browse by model year
cheapest per year- All years
- 2024 · from $41,962
- 2023 · from $33,900
- 2022 · from $31,385
- 2021 · from $25,800
- 2020 · from $24,980
- 2019 · from $12,999
- 2018 · from $14,999
- 2016 · from $14,998
- 2015 · from $3,995
- 2014 · from $8,861
- 2013 · from $7,450
- 2012 · from $7,995
- 2011 · from $8,499
- 2010 · from $8,500
- 2009 · from $10,990
- 2008 · from $7,990
- 2007 · from $3,500
- 2006 · from $4,495
- 2005 · from $3,999
- 2004 · from $4,900
- 2001 · from $12,477
- 2000 · from $12,000
Cheapest 10 listed right now
ranked by price-
$14,9992018 Audi S4 Quattro Premium Plus127,275 mi · Chantilly, VA · Autoheaven incView listing → -
$17,8002018 Audi S4 Quattro Premium Plus119,000 mi · Derby, CT · PRIME AUTOMOTIVE LLCView listing → -
$17,9992018 Audi S4 Quattro Premium Plus102,521 mi · Jefferson, GA · Atlanta United MotorsView listing → -
$18,2992018 Audi S4 Quattro Premium Plus117,381 mi · Annapolis, MD · Fitzgerald Auto Mall Annapolis West StreetView listing → -
$18,5002018 Audi S4 Quattro Prestige Technik106,000 mi · Plymouth, IN · Car MastersView listing → -
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$18,9992018 Audi S4 Quattro Premium Plus110,771 mi · West Chester, PA · Crossroads Auto SalesView listing → -
$19,0002018 Audi S4 Quattro Premium Plus86,400 mi · Pleasant Grove, UT · 313 MOTORS LLCView listing → -
$19,0002018 Audi S4 Quattro Premium Plus91,189 mi · Martinsburg, WV · CMA's Toyota of MartinsburgView 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 S4 asks $21,330–$27,991. 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 S4 cost?
A used 2018 Audi S4 in the US typically lists for $21,330 to $27,991, with a median asking price of $23,895 across 68 active US dealer listings. Nine in ten are priced between $18,369 and $32,139 (as of 2026-08-31, source: UnderMarket Cars).
Is $24,000 a good price for a used 2018 Audi S4?
That sits at about the market median ($23,895) for a used 2018 Audi S4. Under $21,330 puts you in the cheapest quarter of active US listings and under $18,369 in the cheapest 5%; above $32,139 is the priciest 5% (as of 2026-08-31).
What is the cheapest used 2018 Audi S4 for sale right now?
$14,999 — a 2018 Audi S4 Quattro Premium Plus in Chantilly, VA, $8,896 under the median (as of 2026-08-31).
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 S4 price page at least twice a day. The data date shown on this page is 2026-08-31.
Explore more
Prices updated 2026-08-31. Data covers active dealer listings across the USA.