returning this grill, these mouse ears, or this holiday lawn flamingo, you might be surprised to find that holiday gift you just didn't want, well, it didn't go back on the shelf. it comes to places like this, where tens of thousands of items a day will come in, returns that will be someone else's discounted treasure. so, how big is this facility >> this building is just over 100,000 square feet. it has about 10,000 items coming in every day >> reporter: jeff is the general manager of liquidity services. part of a growing industry of companies that have made a business off of returns. with a boost from the holidays americans spent nearly a trillion dollars this holiday season, and will likely return 15% of that. more than $140 billion worth of stuff. for retailers, checking returns then putting them back on the shelves takes time, costs money, and requires more staff. >> there's also an unboxing that has to happen. if a retailer is online only,