I just bought mine on Ebay plus I am attorney
I just took delivery on my 2008 Silver M3 Sedan from South Dakota from an Ebay purchase. I didn't have any problems, but I strangely became very upset when I read your post. Scum dealership and BMW NA must know the game that the face of their organization is playing. They will do something. Keep us updated!! As for legal action, it might be better to let BMW NA intervene and save the lawyer bucks for mods. The argument for the dealership is that you did not put up any consideration (I'm on your side though) and you are out no $. But stick to your guns and best of luck...