There is reptileexpo.com. It has shows for the Northeast. There is one in Long Island, White Plains and New Hampshire. They are supposed to be huge though. I might go to the White Plains show even thought it is a 2 1/2 hour drive for me.
There are 2 coming up in PA
The Greater Harrissburg reptile expo in carlise pa on 11/21/09
The northwestern Berks reptile show in Hamburg pa on 12/05/09
I went to the one in White Plains in September and was able to get a Mack Snow Het Tremper leopard gecko that was born on 7/23/09 for $25. They had a lot of items for great prices. I would like to go again but might wait until the next time around.