The store is a combination of stuff that has walked in the door and multiples buy-outs of other places, including the former biggest place around that kept much of it in storage away from the public. Actually I live in a small town, in a mostly rural state. Luckily for me I guess, the game collecting scene here isn't huge. There's definitely some collectors, but I imagine not as much as the average town sees. They also never take their stuff to cons and sell out like most stores do. Prices are usually eBay, sometimes a little more.
When I was in there taking pics, an N64 with about 30 games walked in the door. Stuff like that happens on a daily basis there.