Just seems to me that GameStop can order about anything from their site for you even if it's not on the shelf, and there's a GameStop in every single town in America. It seems too easy to me.
Not saying I don't go there sometimes, I do. But it just doesn't give that same feeling of satisfaction that I get if I, say, find a boxed copy of Castlevania 1 on NES at Goodwill for $10 (which I did, alongside a boxed copy of Contra for the same price).