The average asking price for a used 2021 Mercedes-Benz GLS is $42,635, with 67,051 miles on average, across 93 cars for sale at U.S. dealers as of Nov 10, 2026.
| State | Average asking | Average miles | For sale | Days listed |
|---|---|---|---|---|
| Virginia | $40,414 | 64,132 | 10 | 77 |
| Texas | $42,539 | 66,152 | 9 | 45 |
| Florida | $49,711 | 52,735 | 8 | 57 |
| California | $46,493 | 61,692 | 8 | 84 |
| North Carolina | $40,125 | 76,895 | 5 | 36 |
| Tennessee | $41,673 | 75,227 | 5 | 33 |
Used 2021 Mercedes-Benz GLSs for sale at U.S. dealers ask $42,635 on average (half ask less than $41,790), across 93 cars. The cars for sale have 67,051 miles on average: one with fewer miles is worth more, and one with more is worth less. To check one car's price against cars of its trim and mileage, enter its VIN in OttoQuest's free Deal Check.
The 83 for sale with a listing date have been listed 60 days on average. A car listed much longer than that, or one whose price has already been cut, usually leaves more room to negotiate.
The 2021 asks $42,635 on average with 67,051 miles; the 2020 asks $33,280 with 81,627 miles, and the 2022 asks $49,203 with 53,194 miles.
Used and certified cars for sale at US dealers, each car counted once. Days listed are the dealer’s own days on market where they publish it. Price moves compare the same cars at both ends of the window.
