I have presented your question to the team and the administrators for consideration.
In my personal opinion, this isn't a classifieds website or craigslist. If you have non-reef item you want to trade up for something reef related, I think that would be ok, but simply a classifieds section is beyond the scope of the site.
Again, thats just my opinion. If the team and administrators decide that this is a good idea we will create a new sub-forum.