Shopping season, the bills can pile up. who doesn't need some extra cash? >> unreturned gifts post-holiday is like a mini gold mine sitting in your home. people could have somewhere between $50 to $250 worth of merchandise just sitting there. >> reporter: so, we brought in tech maven joanna stern from "the wall street journal" to help them turn their christmas loot and household goods into cold, hard cash. did you know you could get cash for kids' clothes without leaving your home? thread apple gives you dough for gently used duds. they send you the bag. you just send it back. >> zip-up hoodie...