Here is an excerpt from the Terms of Service (TOS) regarding the sale/trade forums:
Classifieds posting rules: Our for sale/trade forums are offered as a benefit of membership and members must have 25 posts and must have been a member 30 days prior to placing an item in this section.
* Place only one ad per item - do not post or repost an ad in more than one section of the classifieds.
* We expect ads placed to be related to the topic of this forum.
* Do not place ads directing others to an e-bay or other online sale or directing others to another website.
* Ads may be removed by our staff at any time for any reason.
* Members must have an account history that includes 25 posts prior to using our classifieds.