This 1988 BMW M5 has 230k miles on the chassis, but the seller swapped in a 3.6L engine from an E34 M5 that now has 110k on it. The rest of the car appears stock and in good condition, and the seller has owned it since 2008. Find it here on Craigslist in Madison, Wisconsin for $7500. Special thanks to BaT reader Cameron P. for this submission!