Gun shows are a major source of bargains, but there are a couple of cautions: First, don't think that you're going to encounter some poor oaf who has no idea of the value of what he's selling. At every show I've ever been to, each dealer knew exactly how much his stuff was worth. Second, if you happen to get stuck with a lemon, you are well and truly stuck. A gun store is going to be there the next day, as will the websites that sell used guns. But the guy at the show who took your cash will have vanished, never to be seen again.