I'm pretty sure any forum EXCEPT the gear swap allows users with less than 15 posts to start a thread. The Gear Swap is vulnerable to people signing up on Epicski solely for the purpose of selling gear, and not being part of the community. Since we generally know nothing about these people, we would rather not give them access to the "trust" that goes with selling.
You can find any thread you have posted on by going to your home page and looking at your activity. That can quickly take you back to the thread, or tell you if there has been any new activity (posts) there. Gear Swap is not a place where threads are started to ask questions. If you have experienced a loss, we will do our best to help you track down as much information as we can. Otherwise, you should be able to quickly locate a thread, and ask a question in the thread, send a Private Message to the thread starter, or and email if they have allowed email contact by Epicski.