Some stuff is overpriced...some ain't. You can work with the seller on price, and see what happens. Is also a chance to meet other forum members/web forum sponsors who might give ya discounts too.
I go to see the vast variety of stuff, and a chance to get hands on with tools and holsters. As far as shopping for guns/rifles...research what you want to see...a few shows there have been a few vendors who sold some sketchy equipment in the black rifle varieties.