How do I post in the Trading section?

New to the site - how do I post to the trading forum.

"You must be a registered member for 30 days before posting a new thread to this forum. Before then the system will redirect you to an access denied page if you try to create a new thread."

From here: https://www.cheapassgamer.com/topic/49710-tradingfeedback-rulesguidelines-all-cags-must-read-updated-6152016/