Sending in your old phone or iPod for money isn’t anything new, but I recently found Flipswap and they’re a little bit different than other services out there. For one thing, everything is free and they even pay for your shipping costs. I’m not sure how their algorithm works, but they claim to give the highest trade-in value for your phone. Simply input your info, answer a few questions about the device and the phone’s IMEI and they’ll give you an estimate of your device and send the check right out. First gen iPhones are currently fetching around $190.