Seriously, get the unlimited for a month. I bought it after I had decided on the car, told the guy I wanted it, then went home and got this nagging feeling I should check. I bought the month-unlimited (in case it was bad) and found out it had been rolled back!
Kept looking (thank God I bought the unlimited) and found another one I wanted. Turned out that it was totalled, with a salvage title at 5k miles! The owner swore his buddy owned it and only had a fender replaced. Nope, sorry.
Finally found the car I'm driving now, and it has a clear title and I KNOW it. It's worth every penny if you're buying a car.