Used 2018 Mercedes-Benz GLS-Class Price in the US
A used 2018 Mercedes-Benz GLS-Class in the US typically lists for $17,320–$23,667, with a median asking price of $20,398 across 163 active US dealer listings (as of 2026-08-28). The cheapest one listed right now is $11,999, a 2018 Gls450-4m in Snellville, GA — below 95% of the market, so expect an older model year, a base trim or high mileage.
- Typical range
- $17,320 – $23,667
- Median
- $20,398
- Cheapest 5%
- under $14,038
- Cheapest listed now
- $11,999
Browse by model year
cheapest per yearCheapest 10 listed right now
ranked by price-
$11,9992018 Mercedes-Benz GLS-Class Gls450-4m134,051 mi · Snellville, GA · North Georgia Auto Brokers, IncView listing → -
$12,4992018 Mercedes-Benz GLS-Class Gls450-4m155,584 mi · Hudson, FL · Rosa's Auto HouseView listing →
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$12,5002018 Mercedes-Benz GLS-Class Gls450-4m112,054 mi · Houston, TX · Lexo EnterprisesView listing →
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$13,7802018 Mercedes-Benz GLS-Class Gls550-4m149,431 mi · Fort Pierce, FL · Autosport MotorsView listing →
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$13,8002018 Mercedes-Benz GLS-Class Gls550-4m93,760 mi · Hollywood, FL · Elite Auto AuctionsView listing →
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$13,8022018 Mercedes-Benz GLS-Class Gls450-4m130,185 mi · Chantilly, VA · Auto Deal MakersView listing →
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$13,9002018 Mercedes-Benz GLS-Class Gls450-4m32,167 mi · Bowling Green, KY · Ride and Drive Bowling GreenView listing →
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$13,9992018 Mercedes-Benz GLS-Class Gls450-4m146,111 mi · Fredericksburg, VA · Sullivan Auto Trading Inc.View listing → -
$14,3882018 Mercedes-Benz GLS-Class Gls450-4m121,321 mi · San Diego, CA · Southern Cal Auto House CoView 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 Mercedes-Benz GLS-Class asks $17,320–$23,667. Cars this far under usually carry an older model year, a base trim or high mileage.
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10 pinnedFAQ
How much does a used 2018 Mercedes-Benz GLS-Class cost?
A used 2018 Mercedes-Benz GLS-Class in the US typically lists for $17,320 to $23,667, with a median asking price of $20,398 across 163 active US dealer listings. Nine in ten are priced between $14,038 and $33,955 (as of 2026-08-28, source: UnderMarket Cars).
Is $20,000 a good price for a used 2018 Mercedes-Benz GLS-Class?
That sits at about the market median ($20,398) for a used 2018 Mercedes-Benz GLS-Class. Under $17,320 puts you in the cheapest quarter of active US listings and under $14,038 in the cheapest 5%; above $33,955 is the priciest 5% (as of 2026-08-28).
What is the cheapest used 2018 Mercedes-Benz GLS-Class for sale right now?
$11,999 — a 2018 Mercedes-Benz GLS-Class Gls450-4m in Snellville, GA, $8,399 under the median (as of 2026-08-28).
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 Mercedes-Benz GLS-Class price page at least twice a day. The data date shown on this page is 2026-08-28.
Explore more
Prices updated 2026-08-28. Data covers active dealer listings across the USA.