Don't open them and return them to a gamestop near you....see if they'll take em.
If not put them on ebay I'd imagine you can make at least your money back if not turn a little profit.
I've had luck setting the BIN a little lower than the lowest available.
No need to put them on eBay. Gamestop's return policy seem quite clear that they will take them as returns:
"What is your return policy?
Most products ordered from GameStop.com can be returned directly to our warehouse or to a GameStop store, subject to certain guidelines. See the Return Policy for full details.
Returns are acceptable for items:
Returned no more than 30 days from the date on the packing slip.
New items that are unopened and in original packaging."
Just maybe don't return them all to the same Gamestop store. But if stores don't have this item or are low on stock I don't see why they wouldn't be willing to accept them as they would surely be able to sell them since it is the holiday season.
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