according to the forum rules, you need a minimum post count of 250 and need to have been a member for at least six months to access the marketplace forum.
I can understand the intent here, but those are pretty tough standards.
It doesn't take too long to reach the 250 posts, and the 6 months will just sort of happen.
I guess at my posting rate (.62/day) I'll have access in another 15 months.
Most likely I'll forget why I wanted access by then.
Whats are you trying to sell
Have you tried ebay, gumtree etc?