As a civilization, we need to do better than we are when it comes to how we dispose of old technology. Every new piece of kit we pick up, whether it's a phone, a tablet or a laptop, comes with a shelf life. When that shelf life expires, we simply adopt the new gear and throw out the old. What we throw away usually ends up on a landfill somewhere, blighting the landscape. Not only that, you're quite literally throwing money away.
We're not talking a few dollars here, either. Those commercials on television offering to pay you $30 or $40 for your old phone may have been lying to you - they could have been worth much more. If you have a Motorola DynaTAC, you'll get $500 just for the handset. If you have the original packaging, multiply that by 20. No, we're not joking. They really are worth that much to collectors!