How many do you have? Are they all 9"? If you have 5, I wonder if I should see if I can buy one. I have a "set" of 6 wheels, 3 fronts for w211, one rear like the one pictured for w211, and two rear for w220.
Ultimately, I'm looking to sell mine too, but I'm on the east coast, and mine isn't exactly a "set".