I use craigslist when I want to sell something, because that's where the buyers are, not because of its simplicity (or lack of futures). And ditto for ebay.

If I were a serious seller, I would want a shopping site with bells and whistles (a detailed admin area, user accounts, reviews, discussions, etc) that might contribute to the selling part.

This site would be a fantastic tool if it worked with craigslist/ebay.