Could be worse, LD. I once asked the clerk at GameStop to look up DJ Max Portable 3. They don't have it in their system at all, so it pretty much doesn't exist in their eyes. If for some reason I wanted to trade it in there, I wouldn't be able to (regardless of things like it definitely being a US copy and it being impossible to create homemade UMDs).
Saying "DJ Max Portable Three" out loud is also incredibly awkward.
Incidentally, only one new game I've bought at GameStop in the past year or so has been a gutted "new" copy instead of a sealed copy from behind the desk, and it was their last copy in stock (and on sale). Unless your GameStop is even smaller than mine, I don't know why they'd only have one copy of a brand-new game, even a niche title; both of the stores near me are tiny, and they've had multiple new sealed copies of things like Shin Megami Tensei: Strange Journey and Pangya Portable.