I talked with a fellow that goes there every winter. He says that you would be surprised with the poor workmanship on a lot of those cars. When they put them on camera, they know what angles to shoot and what parts of them not to show.
Maybe this is why prices are all over the place. The buyers see them in person and can better judge what they should bring, than we can watch on TV.
As I've heard said before, with enough polish even a turd would shine under bright lights.