Used 2018 GMC Terrain Price in the US
A used 2018 GMC Terrain in the US typically lists for $11,969–$16,390, with a median asking price of $13,995 across 852 active US dealer listings (as of 2026-10-19). The cheapest one listed right now is $6,900, a 2018 SLE in Toledo, OH — below 95% of the market, so expect high mileage, a base trim or a branded title — check the vehicle history.
- Typical range
- $11,969 – $16,390
- Median
- $13,995
- Cheapest 5%
- under $8,995
- Cheapest listed now
- $6,900
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typical price per yearCheapest 10 listed right now
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$7,3772018 GMC Terrain SLE136,462 mi · Greenfield, WI · Kunes Buick GMC of GreenfieldView listing → -
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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 $11,969–$16,390. Cars this far under: expect high mileage, a base trim or a branded title — check the vehicle history.
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10 pinnedFAQ
How much does a used 2018 GMC Terrain cost?
A used 2018 GMC Terrain in the US typically lists for $11,969 to $16,390, with a median asking price of $13,995 across 852 active US dealer listings. Nine in ten are priced between $8,995 and $19,976 (as of 2026-10-19, source: UnderMarket Cars).
Is $14,000 a good price for a used 2018 GMC Terrain?
That sits at about the market median ($13,995) for a used 2018 GMC Terrain. Under $11,969 puts you in the cheapest quarter of active US listings and under $8,995 in the cheapest 5%; above $19,976 is the priciest 5% (as of 2026-10-19).
What is the cheapest used 2018 GMC Terrain for sale right now?
$6,900 — a 2018 GMC Terrain SLE in Toledo, OH, $7,095 under the median (as of 2026-10-19).
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 GMC Terrain page is regenerated from it when it is requested. The figures on this page are from 2026-10-19.
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Prices updated 2026-10-19. Data covers active dealer listings across the USA.