[quote name='docvinh']I bought an xbox 360 from Kmart a while back, and still haven't opened it due to the fact I needed to raise some cash to actually pay for it (charged it on my cc). I was originally going to sell it, but since I got the Kmart "special" deal core system, I'm now faced with the dillema of whether I would rather just keep it to play. Overall, are the games really that good (I like FPS's by the way), or should I just sell it off for a profit? Keep in mind I will make a profit due to Kmart.

Thanks for your opinions in advance.[/QUOTE]
I think this is pretty easy. If you want the XBOX 360, open it. You aren't going to make a big profit now anyway. If you don't want the XBOX 360, sell it and get whatever you get. You've pretty much missed out on the ebay rush for 360s, so if you do want the system there's not much point to selling it. And you aren't going to "make a profit" off the Kmart deal if you plan to buy the XBOX 360 again in the future, as if you do buy it a second time in the future you will essentially lose the money you saved from the kmart deal by buying the XBOX 360 for the full price the second time around. i.e. if you got a premium through a glitch for $300 and sell it for $400 now, then in the future buy a premium at normal price for $400, you have made no net profit.
And it is an awesome system, btw. Perfect Dark Zero, Project Gotham Racing 3, Kameo, and Call of Duty 2 are all fantastic games. Ghost Recon Advanced Warfighter and Gears of War are coming up as well and those also both look awesome.