Carfax helped ease my mind. I was worried because I purchased a used car with only 30,000 miles. It is a 2003, so I started thinking this sounds to good to be true. So I purchased my Carfax report after I purchased my car. I know that is not to smart. When I got my report I felt better knowing that the mileage had not been tampered with. I really lucked out because nothing bad had ever been reported on the car. The previous owners just didn't drive much at all. But I will be sure to get a Carfax report before I buy another used car. The reports contain a lot of useful information in them. Plus you can't go wrong with the buy back guarantee. I wish I would have purchased a report for the two previous used cars I got burned on. So I highly recommend that you get your Carfax reports before handing over any money. Like I said I just happened to luck out this time.