I used to go to 3 or 4 gunshows in the St. Louis area each year. The only "deals" I ever saw on guns were the ones individuals were carrying around to sell. I also saw the same dealers at the same shows every time many with the same over-priced inventory. With a little eavesdropping, I learned that the only people buying guns an in most cases ammo from the vendors, were 'newbies' who didn't know the value of the merchandise.
A few years back I used to see some decent deals on holsters, some reloading equipment, and sometimes reloading components. At least in our area, the shows aren't designed for the knowledgeable shooter and I haven't been to one for over a year.