Location is factor, as is condition (condition becomes the most
important factor as a car ages).

KBB retail (in Calif) $3,875, Edmunds retail $3,881, private party $2,576

http://www.edmunds.com/tmv/used/mercedesbenz/index.html

Buy the best quality car that you can for there's no senior discount for
old M-Bs, and these cars are very expensive to have fixed; the economics
of this age car only work well for DIY owners.