Looking for the latest unreleased smartphone or smartphone OS? Well, aside from the random watering hole, Craigslist might be your best bet.

Someone by the screen name of xs2K claims, in apost on the Windows Phone Central site, to have purchased a phone off Craigslist that’s running an as-yet-unreleased update to the Windows Phone 8 OS called General Distribution Release 3 (GDR3).