With CAG16 and Power Up Rewards you can save 26% off their prices. In almost all cases that would be cheaper than eBay. Not to mention retro games are included in B2G1 along with PUR (it's a nearly 40% discount in that case).
So I'm clear, is any CAG buying retro games from GameStop, period? Wouldn't it be cheaper to find Chrono Trigger even on eBay with a couple minutes' work?
Also, Chrono Trigger goes for over $110 on eBay and Amazon so even without discounts, GameStop is considerably cheaper.