My Son and I were looking for a good used car for him on craig's list and I used Carfax to run license numbers and any VINs that the owners provided to get the histories on those cars before we drove to see them. As luck would have it we ended up buying from a dealer who also provided us with carfax before we bought the car. We got the car we sought and hardly drove any distance at all before we purchased. We knew it was a two owner car that had regular service with only minor hail damage, and it had been repaired perfectly to our satisfaction. Carfax paid for itself in gasoline savings.