I but used from Gamestop because s0metime you get a great deal, the other week i bought Fallout3 for 7.50. And you can take them back, I bought Legendary the other day, it looks awesome, but that game sucks hard... no big deal, going back this afternoon for a refund, i did teh same thing for burn out paradise. they do over charge though, if it is a game that I know I want like Call of Duty 4 I went pawn shop hunting and got it for 15 bucks, while at gamestop it is still 30-40 bucks used.
And the Edge Card is awesome, if you buy a couple of games a year, you get the magazine, and its pretty good, a lot better than it has been, it use to be just a big gamestop catalog, now it is a legit publication in my opinion.
You can also use teh edge card on used accessories too, I got a PS3 charging station for 4 bucks there before.
I want to buy Split Second, but as it is 55 bucks STILL I will not, but I'll wait, christmas 2011 it'll be 30 then and I will have it.