This seems very inefficient... requiring a forum post to sell something. Why can't I just advertise on the server?
I was getting to that.
The Marketplace Forums are for selling very large or rare items, and by making a post here to buy, sell, or trade, you can not only do it in a moderated setting but also use your post as a sales log to keep track of who gets what.
You can still advertise items for sale on the server! This is simply a dedicated section of the Forums that provides logging and a broad reach of item sales, to players both online and offline (rather than only online players in the server).
If you feel any shadiness (uncertainty, dubiousness), you may also contact an administrator to safely trade items and currencies between you and the other party, resulting in a complete and fraud-free exchange.
Here's what you should list in a marketplace post:
The Marketplace has a few rules. All forum rules apply.
Any player violating the rules will not be banned from the forum, but be banned from the Marketplace.
Good luck with your future sales!