Brian L hit it on the head. These things have become shows for paramilitary fan. Lots of junk for the most part and prices no sane person would pay for a used gun.
The "unabomber wannabes" is an accurate description of what I saw at my last gun show a couple of years back. It's scary to see what kind of people are there walking around bristling with guns and knives bought and for sale.
I think they have a right to have the shows, but I won't be attending any more.

Give 'em a barrel!