I know a guy that buys bad wrecks at dealer's auctions, then pieces them together to look good and then sells them at a different dealer's auction. If there is a Carfax on what he gets the damage is never listed as bad as it really was. He did one that they cut the whole top off and it still showed a clean Carfax. That car had more bondo than a rust bucket and there was no was way it was structurally safe the way it was done but it did look pretty good. Carfax is only as good as what they are told.
I always buy from a private party that has actually owned and driven the car for a while. Usually a better vehicle and a better price.
