On the scale of fun things to do, buying a car falls somewhere between getting a root canal and going for a checkup at the proctologist. After all, there's no way to know if the car was just fished out of a river or if its head gasket is about to go. Or maybe there is. CARFAX reports give car buyers a complete history of every car, including service records, title transfers and any and all accidents the car's been in.