I just ran a Trading Post non-donor test with ETNSN (a non-donor alter-ego of mine). If you go to The Trading Post now you will see the thread. The only gotcha that I encountered is that the thread had to be approved before it became visible to anyone else. I don't recall that as being a requirement in the past and by itself it wouldn't be a significant problem to you. However, after the thread was approved, I discovered that each reply by either the thread originator or any other non-Moderator member whether Donor or not had to be approved by a Moderator before it became visible to anyone except a Moderator. This would be a major problem in reaching an agreement with anyone else whether the purpose of the thread was to trade something that you have or to give it away. This would waste a lot of time for at least three people, one or more being the moderator(s) who had to approve each individual post. I'll report it to the Admins and request a fix.