Regarding requirement to sell through dealership ... This kinda "service proxy" (which can be easily eliminated but it's not) is a common problem in this economy. Same thing with real estate agents. Do we really need that RE agent for our house sale/purchase to go smooth? Why not just create one central official website where sellers and buyers can find each other and do all paperwork, money transfers, bidding and other stuff online according to strictly defined procedure? I don't see any technical difficulty here.