The next car on our list also has 500 horsepower, but this one is a lot faster than the Ram. The BMW M6 has been featured on some of our lists before, and buying one has never been cheaper. Unfortunately, the S85 V10 engine that BMW used in the M6 and the M5 was notoriously complex. The car also used a seven-speed SMG single-clutch transmission that liked to eat up clutches to the tune of around $2,000 to $5,000, depending on where you get it serviced. No wonder why these cars have become so inexpensive. We found a 2006 model
with 102,000 miles on it for just $16,000. Considering that a new one will cost you more than $100,000, a used BMW M6 might be the value of the century.