So far, I've traded in all my useless XBox and PS2 games over to EB for store credit. What they do is scan all the no-longer-needed games you turn and convert the total amount they're worth at the moment to either cash or store credit. They put it all on a card so that I can to any EB store and use that credit.
Some of you should try this as you don't have to spend a dime for FSX when you use the credit you earn from giving away that useless Game Cube you don't use anymore. That way, you save those $70 for buying that $2,000 rig.
Of course, it won't help you get FSX any earlier than the 17th but at least you won't have to pay for it [in a way].