As well as posting your items to trade or sell here in the forum you may want to consider using a free ads site. You can use www.ideas2earn.com/cgi-bin/classifieds.cgi or if you want to get away from ideas2earn then simply go to www.usfreeads.com Ihave had mixed results but it is free and you can post under multiple categories to see which works best.

I try to send visitors to a specific landing page so that I can track the results but Google Analytics is pretty good at telling me where visitors are coming from.