I saw a 1995 E300D a few months back with less than 20K miles for around $24,ooo. If I saw that again, I will definately offer the buyer $20K for it. I know that even that car is not worth the $20K but these cars are NOT meant for everyday "us regular" people. There are enthusiasts with BIG BUCKS who will pay. All you need is one person.
If you are not hurting for cash, DON'T try to "unload it" quickly. You will see that waiting months to get the "right" buyer will be worth it.
Cheers