I got my first Icon for $80 on Craigslist. Had very little wear and tear but was still in great shape. It had a problem where, when the processor got hot, the screen would not respond anymore until putting the phone to sleep (discovered this while playing Modern Combat 5). I checked to see if it had warranty and it still did, so I sent it to Microsoft.
They warranty replaced it but it turned out to be someone else's phone that had been used on Verizon with a blocked ESN (and couldn't be used therefore on Straight Talk). Sent that one back and got a brand new black one from Microsoft. I couldn't imagine parting with this phone, especially for the price, and it definitely my perfect device. Has NFC (when mobile payments finally come with 10), perfect camera, perfect screen, SOC is still good for its age (though it's dusted now lol).