Rental cars are hit or miss. You either end up with the one that didn't get much use outside the average business trip... Or the car that was abused. My last car was an ex-rental car, and it deteriorated very quickly after I signed the loan for it. Be careful.

The problem with rental cars is that everyone treats them as if it isn't theirs. I'd be careful about buying something nobody feels responsible for.

Having driven many rental cars, I'd never buy one...