I've done some research in the past few months on puppymills and what I can do to help this problem and I've found that some puppymillers sell to auctions, see link below.
http://www.critterhaven.net/pmauction.htm
These puppymillers sell to anyone they can, pet stores, auctions, even people who have booths at flea markets - just anywhere they can make a quick buck. The condition at flea markets might not be as bad as the auction, but they are just a smaller scale version of these horrible people. They are still breeding to make a profit, not making the breed any better, even selling sick puppies.
These people make me sick, sick, sick.
Sorry for the ranting, but I just can't help the churning feeling in my stomach every time I think about these puppymillers.