If you have some gift cards to stores or restaurants you don't plan to visit, don't just let them collect dust. Barbara Welch hasn't paid full price for things in a long time - not since the Kingston Springs woman found the website , where you can sell gift cards you don't want for cash back and buy the ones you will use at a discount.br br "It's a hobby for me," says Welch. "I'd say the most I've gone on is 5 times in a day."br br Welch has saved big bucks shopping this way.br br "Probably about $5000 over the past year and 12," says Welch.br br The biggest savings came when the Vanderbilt nurse bought Lowes gift cards there for 15 off to buy the materials for her new roof.