We have a Trading Section but it is initially invisible to new members (those with fewer than 75 posts). This is mainly to prevent people registering with the site, posting a single trading post (whether for actual trading or for advertising their webstore) and never contributing to the site as a whole.
Anyone wishing to gain early access can PM a Global Moderator who can, by their discretion, grant them said access. In your case, I think we can do this, so you should shortly be able to see the
Trading Board as a sub-forum of the News, Rumours and Trading board.