I go to the Central Florida/Orlando one, it's rare though. I have met the one guy there worth knowing a figurative figure you could say. He gets there at 9 a.m. in the parking lot. He's an older guy with a grey beard and a trunk full of old guns. His car is beat up but still runs, usually American made and his eyes tell a story of living a good but hard life, one where he's earned every dime he made and maybe worked a little extra for the money he never got. He opens the trunk and watches for folks to walk by, looking for folks he thinks are 'good people.' If he thinks you are a criminal he ignores you or tells you to move along. The guy has had these guns sitting in his home for years if not decades and he wants them going to a good place, not end up being used in a crime. If you are a guy out with your girlfriend and wife(I just caught that as I was rereading for spelling errors, but hey if you do you are a lucky guy) and you look clean cut he'll smile at you and wave you over. He'll make some nice chit chat, talk to you about you are doing there, your taste in guns and such, maybe some politics and then the eye candy will come out. Some of it is worth it like an older 1911 that's mechanically sound but the bluing is rough. The kindly man will ask $400 for it since it's generally a Colt. Next he might take out a model 15 or 10 and ask for $300 but will take $280.
He might have a shotgun he's only asking a $100 for. He'll maybe have a Savage 1910 he can let go for $150 with only one magazine for the gun but its bluing is gone. Once in a blue moon you'll see a S&W 28 4" for three hundred but more likely four hundred, it will be used in the standard norm of gun ownership. Maybe you'll find a Colt .25 pocket gun. The kindly old man is selling off his collection because he can't afford to shoot these guns anymore. Or he wants them to go somewhere he feels they'll be good and so maybe he can buy that "one gun," the really expensive one he never thought he would own, off the proceeds of his sale. He's not looking to get rich but he's also not looking to get robbed either. If he likes you and gets a good feel from you, you might, and that's a big might, get a great deal. I got a model 15-3 4" from one such guy for $240 that was mechanically great that has functioned flawlessly with LRN and Winchester Personal Protection .38 Special +P JHP, it's only mar is a small patch on the top where the bluing is worn. It was his truck gun and now it is my truck gun. I've gotten a Bersa Ultra Compact 9mm for $260 that was nearly new(supposedly never fired but it looked like it had been cleaned recently) in the box, it took some haggling and hanging out with the man who was in seemingly chronic back pain but after half an hour he took the cash to go buy a H&K, the Bersa has given me great service and performance.
The moral of the story, go for the Georgia-Arms canned heat ammo because their ammo is just plain great for .44 magnum and .357 magnum and keeps me in practice ammo they are the reason I go three or so times a year, the website might not have supplies but the gun show guys do. Enjoy the pulled pork sandwhiches, get some great beef jerky, and unlike a strip club you can usually touch the goods on display.
Look for the older guys getting rid of guns they haven't shot in years, I've seen Colt snub nose revolvers at insane prices but I can't buy everything I want anymore, law school loans, a growing successful small business(hope to keep it going after I find a job), there'll be lots of older guns that are in great shape. The younger the guy typically, the less worthwhile the gun and the less worthwhile the price. The older guys won't give you a steal but you'll still likely get a deal. I say this with a caveat though. Before "flippers" I've seen these guys in action buy a gun for $200 up front to less than an hour later sell it for $500 to those who seem very eager to pay without a background check. $500 for a gun that retails new for less than that. Report it to the ATF guys on location but don't expect them to do anything.
Look for the older guys, be fair and polite, and you might just get a deal.