Used 2018 GMC Terrain Price in the US
A used 2018 GMC Terrain in the US typically lists for $12,006–$16,513, with a median asking price of $14,128 across 624 active US dealer listings (as of 2026-08-29). The cheapest one listed right now is $6,500, a 2018 Sle in Saint Johns, MI — below 95% of the market, so expect an older model year, a base trim or high mileage.
- Typical range
- $12,006 – $16,513
- Median
- $14,128
- Cheapest 5%
- under $9,500
- Cheapest listed now
- $6,500
Browse by model year
cheapest per year- All years
- 2027 · from $29,535
- 2026 · from $23,500
- 2025 · from $6,878
- 2024 · from $8,950
- 2023 · from $12,394
- 2022 · from $11,794
- 2021 · from $7,750
- 2020 · from $6,990
- 2019 · from $5,995
- 2018 · from $5,995
- 2017 · from $3,200
- 2016 · from $3,799
- 2015 · from $2,467
- 2014 · from $1,995
- 2013 · from $2,000
- 2012 · from $2,500
- 2011 · from $1,900
- 2010 · from $3,599
Cheapest 10 listed right now
ranked by price
These are the bottom of the market, not the going rate — every one is priced below 95% of active listings. A typical used 2018 GMC Terrain asks $12,006–$16,513. 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 GMC Terrain cost?
A used 2018 GMC Terrain in the US typically lists for $12,006 to $16,513, with a median asking price of $14,128 across 624 active US dealer listings. Nine in ten are priced between $9,500 and $20,093 (as of 2026-08-29, source: UnderMarket Cars).
Is $14,000 a good price for a used 2018 GMC Terrain?
That sits at about the market median ($14,128) for a used 2018 GMC Terrain. Under $12,006 puts you in the cheapest quarter of active US listings and under $9,500 in the cheapest 5%; above $20,093 is the priciest 5% (as of 2026-08-29).
What is the cheapest used 2018 GMC Terrain for sale right now?
$6,500 — a 2018 GMC Terrain Sle in Saint Johns, MI, $7,628 under the median (as of 2026-08-29).
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 GMC Terrain price page at least twice a day. The data date shown on this page is 2026-08-29.
Explore more
Prices updated 2026-08-29. Data covers active dealer listings across the USA.