Buying and selling "collectibles" used to be a neat way to pick up a couple of bucks, but with the net, Ebay, and shows like this, almost everyone knows what the going rate is for most items. It is the same way at gun shows these days. At one time, you could find some real bargains to fill out your collection. They are few and far between now days. If you check the prices at 5 tables, they will all be within 10% of each other. Sometimes closer. We live in the information age, and most people are smart enough to use the tools out there.
It is still fun to watch these shows, and if you keep your eyes open, there are a few real bargains to be had.