I have literally looked at hundreds of cars over a period of over seven weeks. when I found one that looked like it was the car I was looking for, I would run a CARFAX report to verify the history and maintenance records of the car. It was through CARFAX that I was able to determine that the car I was looking for was accident-free, that the odometer had not been tampered with, and most important to me was that the car was serviced by the auto manufacturer's dealership, thereby eliminating any question as to the cars' reliability and value. Without CARFAX, it is simply a guessing game, and when you are spending thousands of dollars, you need facts, not guesses. I would never buy a car without CARFAX.