I ran across Wigix while searching for alternative sites. At first I found it confusing until I figured out what they are doing.

It is like a cross between the StockMarket and Amazon. No cost listing, no expiration, and easy listing.

Customers can indicate items they want to buy, even if none available. Sellers list items they want to sell. Then I guess you haggle with the customer.

Besides selling there, there are a few ways to make additional money.

1. Category experts can make 1% of everthing sold in their category
2. Post a product page to their catalog and earn 5% everything sold from that listing. Even if not selling it.

Whether you want to get ideas or get serious, its worth a look.