We all have old tech lying around the house. And we're not just talking about that old laptop or smartphone you don't use anymore. We're talking about the stuff that's taking up space in your office, like printers and scanners, or even just extra cables and cords you've got lying around. If you're like most people, you might think it's a good idea to throw it away—but there's a good chance that what you're throwing away has some real value. How much? Well, let's find out!