Just in case some of you are not familiar with it, there is a section known as Market Place (MP), which can be used to buy, trade, or sell used phones by members of XDA. This has been up for some time and has been a very valuable tool for our members to sell devices, parts, and accessories and raise some cash in the process (most of the time, to be able to afford new toys).
As with any part of this site, the MP falls under forum rules for behavior (which can be found here), but it also has a rule set of its own due to its nature. These rules have been updated by the moderator and administrative teams here at XDA. Please take a moment to go through them and be sure to understand that XDA is simply providing the space for the transaction to take place. On top of the modified rules, the anti-fraud guidelines have been updated as well. Be sure that you understand them to minimize the chances of getting scammed. Not that it happens an awful lot, but it can happen if you are not careful enough.