They are no longer the good deals that they used to be. They now generally hold them on weekends, which tends to drive the prices up. If it is a sealed bid auction, which a majority of them are, they have appraizers value the aircraft. But they tend to be very high values for the aircraft. Little things like no logbooks, undocumented repairs, flights not recorded (not only by the criminal, but also the government users), unknown abuse, etc. Also they tend to sit for long periods of time before they are sold. So they tend to be a bucket of problems for the purchaser.