So would it be safe to assume that the majority of the used BMW's on the lot that are not CPO are for a reason? I assume they will tell you that it costs money to the dealer to certify the cars and to remain competitive they do offer a number of them that are not. Sounds like a bunch of BS to me as if for example someone was to trade in a 3 yr old BMW in perfect shape that they would want to CPO it knowing they don't have to do anything to it?