Careat Emptor or Buyer Beware. No where is this more true than when buying a used car. Many used car dealers advertise posing as private sellers. Car Fax exposed them. Many lie about condition and many lie about mileage. Car Fax exposes the mileage and will report any history of damage. Car Fax is an invaluable tool in separating the facts about the vehicle from the fantasies of some sellers. It is a huge red flag when people will not share the VIN. !00% of the time, the seller is then trying to hide something. Protect your money when buying any used car. Use CAR FAX! Ask questions of the seller and then check their response against the facts as reported by car fax. Any lies is a deal buster. Request photos of the instrument cluster with the engine running to check for idiot lights.