I agree that the F10 is the best replacement, but you still need 15-20k to get a nice, well specced one with a decent engine. Last of the line W211's are 4 years old now, same age as my last of the line e39 was when I bought it, and it's still possible to buy them with 1 owner in fantastic condition.
Yea but a last of the line W211 is still very expensive for a car that originally appeared 11 years ago. You are talking well into five figures for a really good one. Seems like too much for what you get.