Well, after reading some replies..I have to say it doesn't make sense..based on experience it's really the casual gamer and parents that do most shopping at Gamestop. In fact, it would be to their disadvantage if collectors, resellers, and CAGs were the main shoppers, because then they'd really get screwed out of some money.
However, it still doesn't make sense to me. If a collector buys the game and keeps it, if a reseller buys the game and sells it, if an employee buys the game and sells it, there's no difference in end profit. The collector might buy another game if he sees it, the reseller might buy another one too, and they're already getting a full shift, subservience, and work from the employee, so it's all the same [probably even better if the employee's income goes straight into the store]
But here's my real question, if they DON'T want employees to buy games, why do they keep PSOne rares and old consoles games in cabinet's where no one can see it? Why not have a "collector's corner" or a "manager's choice" section where old stuff and gems are stored? Then actual collectors, non employee resellers, and customers in general can actually sell them. But for the most part, GS/EB keep the oldies and the rares out of reach from walk ins.
I swear, the only way to get anything from the cabinets at Gamestop is to buy a large amount of merchandise, do a bunch of trade ins, be buddy buddy with the manager, or have tits and a tight shirt on.