Fry's aren't going belly up any time soon. Randy Fry owns a fleet of Learjets and is making enough to buy more, and the company owns a golf course on a mountaintop somewhere. They're expanding left and right; building another store here in the Dallas area, just the latest in a string of new stores.
CitznFish -- don't mean to burst your mad-on, and I don't want to sound like I'm defending Fry's, but (a) most places you'll go have a 30 day return policy on most stuff (even places like Wal Mart and Best Buy) and (b) the return policy is no big secret (it's on the back of the cash register receipt). (What does it say on the bottom of the green sheet -- store credit, cash, check or ??? Depending on the cashier, you can get a cash refund if you buy something -- can be something small, a pack of gum or something, just go in and say "I'm paying with this, can I get cash back?" They might go talk to a supervisor, but if the amount is $40 or less they probably won't even balk.)
Next time you go into Fry's (anyone, not just Fish) and you get bad customer service, pick up one of those Direct Connect flyers, fill it out and send it in; make sure you get the name of the person who pissed you off. I think they're postage prepaid, and they go right to Randy Fry (president of the company).
Edit: One more thing. Since it's store credit, Fry's already has your money. If you redeem it for stuff or whatever cash back you can get, you're getting it back from them. If you sell it on ebay for less than the credit amount, they've still got your money.