I just sold my 1991 m5. I am looking at a black, caramel 2003 m5--non bmw dealer says car was bought at auction with 13, 700 miles. no service records and dealer asking around 60K. he says no body damage but did agree to allow me to have the car inspected by an authorized bmw dealer. carfax is clean---any thoughts on how to go about this and what would be a fair bid for the car?