Hi bradc130,
The best way to sell these would to post them for sale on a heavily trafficked audio website/forum that has a classifieds section like Audioholics or AVS for example. However there are rules and it is mandatory that you have a certain amount of posts before you can put items up for sale in these classified sections
My advice would be to join a audio forum, make legitimate and helpful posts for a month or two and then post them for sale. It is frowned upon from other members and against forum etiquette to join a forum and immediately put an item(s) up for sale.
