I've met all of the requirements: been a member for 14 days, no overall red reputation and have 25 posts but I still cannot post in the Buy, Sell, or Trade section of the forum. Besides this issue, can DP install a normal contact form-like other forums-for members to be able to contact DP Administration instead of requiring members to contact DP@twitter. This just looks unprofessional, members have to broadcast their questions and/or concerns to DP Admin on Twitter. my .02 cents Love the forum though.
For the first part, similar answer to this one : http://forums.digitalpoint.com/showthread.php?t=1976837 - Dynashox -