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 http://Cardcash.com, where you can sell gift cards you don't want for cash back and buy the ones you will use at a discount.

"It's a hobby for me," says Welch. "I'd say the most I've gone on http://CardCash.com is 5 times in a day."

Welch has saved big bucks shopping this way.

"Probably about $5000 over the past year and 1/2," says Welch.

The biggest savings came when the Vanderbilt nurse bought Lowes gift cards there for 15% off to buy the materials for her new roof.