Those are good questions.
I'm 53, and along with being sort of new to buying/learning about guns, my first gun show was last August.
Have seen everything at Memphis gun shows from nice civilian-styled rifles to Minis, Saigas, regular AKs to Mausers (but might not be authentic German), Mosin Nagants to ARs, nice Russian SKS ($425), M-1 Garands, GI-vintage Carbines (Not built by Auto-O.) etc. Lots of handguns, some bayonets.
Be very careful and do your homework on what you like-some of these guys are as deceptive and as full of crap or outright lies as one or two pawn shop staff owners I've spoken with. Many clean, rust-free ammo cans.
But you will 'scalped' a bit if you accept many prices, not just with guns but on most ammo. They try to convince people that Obama will ban many things, and their propaganda has been quite effective/lucrative for them. Just reading the Internet indicates that this is accepted as gospel, without much skepticism.
The advantage of gun shows is that in some states, records of the purchase seem to only be kept for a limited period.
Read on THR last spring about an SKS on the buy/sell b. board, and after exchanging phone numbers via e-mail, agreed on a very good price.
Met the guy in a McDonald's parking lot by I-40. These are always done with cash or maybe a money order/bank cashier's check.
And no required records are kept-this is the main benefit to those who are convinced that our govt. will try to confiscate our guns, because it happened in Australia not too long ago.
The "Real Crocodile Dundee" was killed
in a shoot out with Australian police over this issue. His name can be located. He was a very valuable promoter of Australian tourism and his country's revenue increased by many millions of dollars. But he was targeted by their federal/local agents.
Australia seems to keep this information confidential. The movie helped keep us from discovering the real truth.
This is not really known over in the US.
Anyway, such fear of confiscation here, along with the vast choices of available guns, have made transactions on gun site "For Sale/Trade" bulletin boards most attractive