There are deals to be had, retail pricing is not the best available but you save shipping and FFL fees in exchange for parking and entry. The ffl fees are still usually more by a few dollars. Cash is king at any show usually. Better price and the ability to haggle and buy from private parties. If you whip out plastic and try to start haggling their profit just went in the toilet or YOU are paying the CC fees with your purchase...
I love going to shows with a few hundred bucks in my pocket. I see what I can find, usually laugh a good laugh at some of the patrons, eat a few samples of beef jerky, and maybe come home with a new toy. Either way if I have no other plans I like the hunt for a good deal. It makes me feel like I won for once.