The average asking price for a used 2009 Mercedes-Benz SL 550 is $20,919, with 70,818 miles on average, across 15 cars for sale at U.S. dealers as of Nov 10, 2026.
Used 2009 Mercedes-Benz SL 550s for sale at U.S. dealers ask $20,919 on average (half ask less than $20,920), across 15 cars. The cars for sale have 70,818 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 13 for sale with a listing date have been listed 158 days on average. A car listed much longer than that, or one whose price has already been cut, usually leaves more room to negotiate.
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.
| $20,182 |
| 70,237 |
| 9 |
