You can always go through the hassle of Ebay. You'd probably get $50. And yes, before anyone says shit (looking at you JMS), there is definitely much more hassle in selling on Ebay than walking into a store and trading something in. Waiting for PayPal to clear, finding an appropriate shipping package, dropping said package off, etc. Or you can check CAG. I would imagine you're a member there? Go to the marketlace section and see if anyone is willing to buy it from you or see if there is a game someone else that has that you could trade for. But again, you're talking about probably the difference of $5, maybe $10 so it would probably just be easier to bite the bullet and trade it in at Best Buy.