For god sake stop repeating what you dont know. Gun shows REQUIRE back round checks. I have been to dozens and they ALL, no matter what state you live in, no matter what state the show is in, they ALL REQUIRE BACK ROUND CHECKS.
What dosent require a “check” per say is a private sale.. except it does. However there is no way to verify that the check was done... example: freemind wants to sell me a 9mm handgun. If a dealer was doing the sale, be it at a store or at a gun show, there are inventory checks and regulatory rules that mandate the checks and legal penalties that easily enforced if not done.. z however freemind is just selling to me. Its easy to trade a little money and its done. If i never commit a crime with it then nobody would ever know the sale took place, unlike the sale taking place at a retail shop or show.