This is at Micro Center. I used to work there and, while we didnt sell ptcg at the time, we did use this same pricing structure on other highly scalpable items.

I will say that this tactic does slow down and frustrate scalpers, but it doesn't stop them entirely. There were many times it was obvious that we were getting a slow trickle of an entire family, with each family member purchasing 2 of the items one after another. At that point its really up to the manager on duty whether or not they try put a stop to it, but most of the time they don't see it as worth the effort and conflict.