Well this is confusing. The link Jean Scott posted is different from the one I found and seems more current, and no Forum shops or apple stores listed. So if that is the case, best bet is to use the new cards for food or spa or tips. Electronics at gift shops are much higher in cost than in stores but a possibility.
One question, can gift cards be sold back to TR counters if you are unhappy with them for say points? (If unused)