Gamestop stores have been running out of real estate for new items for the last five years. With the explosion of Amiibo and Skylanders, along with tablets, Turtle Beach spots, and the additional consoles, they've had a revolving door of things they've been able to carry. Off the top of my head, the local Gamestops have just recently been getting rid of the DS section, Wii section, and have liquidated all rhythm game accessories. There are no PS2, Xbox, Gamecube, Gameboy Advance, or the like in this store.
My point is: if Gamestop starts taking in those PS2's again with the goal of reselling them, I highly doubt any store in the US has room to handle a large PS2 section for games.