Gun shows seem to me to be losing the only things they ever had going in their favor. The prices are no longer better than at gun shops, rather they seem to increase, selection is down, and there are way too many tables that are nothing but A) AR doodads(nothing against that per se, just gets old), B) table after table of brand-new in box guns laid out over the entire table, and all at or over MSRP, and C) misc junk that have nothing to do with firearms or any aspect of the outdoors sporting industry(c'mon folks, indian dream-catchers, religious iconography, and coins? ***)
Add to that that nobody is willing to haggle anymore, and none of the dealers will even look at you unless you hold up one of their products and say, "I want to buy this from you", and it's not worth it for me most of the time.
If they cut out private sales, I think I would simply quit going altogether.