If you search reptile auctions in facebook it should pop up. There is a new group that is just reptile auctions, but they have a lot of balls. NERD also does auctions on their facebook page, you could check them out too.

I got super lucky. The seller lived only about an hour from my house, so not only did I get a smokin' deal on the auction, I also didn't have to pay any shipping. Yay!