Carfax is frequently a joke. I had a car that was "totaled" by the insurance company because the repair cost exceeded their acceptable ratio. I accepted the total, bought it back for cheap, and invested the payout check in having it fixed at the shop that put the estimate together. Two years later, nothing on the carfax, including the salvage title status. I eventually sold it, informing the buyer of the history and providing pictures and invoice for the repairs. Nothing beats an in person inspection or advice from a trusted mechanic.