To begin with I've never had much luck at gun shows on "deals". The gun shops in my area are very competitive with their pricing and the last gun show I went to, and Eastman show in North Georgia there were no deals. In fact they were offering magazines for Beretta 92's for 24.95 each for military mags and I can buy them all day for 18.00 at Clyde Armory in Athens, GA. Used go for 12.00 to 15.00 ea. Weapons pricing was not impressive either. I have a Mossberg 590 military contract shotgun bought used and they had several for over 100.00 more than purchased at Franklin's of Athens. If you do see a deal, get permission to field strip the weapon prior to purchase, look closely at general appearance, check slide to frame fit, insert and realease the mag to see if it drops freely, pull the slide back and release with the mag inserted to verify the slide stop functions as advertised. Generally make sure all the controls function, this is especially critical to determine on a striker fired weapon as you cannot see the action of the hammer. If for any reason they do not want you to inspect the weapon thoroughly, walk away briskly, if a revolver try the indexing on each cylinder position, cylinder latch and realese. If you have a small screwdriver remove the grips and take a peek inside. I keep an old S&W screwdriver in my pocket when going to gun shows for just that purpose. I hope you find a deal, good luck and use judgement and caution.