There is a really nice e28 M5 for sale in Santa Barbara, CA. It has a DINAN Stroker motor that produces 350hp. I believe the car has 140k miles on it, and the owner is asking around 12k. I don't know about maintenance records, but I know that it has been going to my mechanic since I bought my e28 (about 1 1/2 years ago), and he is a great mechanic. If anyone is interested, e-mail me and I can contact the owner and get some info for you. Shit, I'd buy it if I had the $$$.