Had that idea, but I honestly didn't want either game, and the prospects of having to trade away two new games to get enough credit to get other games I wanted... being lazy became just as important. Plus my K-Mart is pretty shitty.
300-50+no tax = 250
300-roughly 70 for trade-ins+24 in tax = 254. I know the extra rewards points at a 15 dollar value will make it better for a lot of people, and more power to you, but my local K-Mart is literally filthy. I've had cashiers burp and sneeze right on my bag. YMMV! (and I hope it does.)