Well, physical goods would just be far too much to maintain - they'd require me to send them, post them, etc... and I don't have the time.
I was thinking more a place to sell digital downloads from users. Take a peek over @ VBcart (
http://www.vbcover.com/forums/vbcart...t&productid=37). I'd not find it hard to download sales stats once a month and mass-pay people their earnings (minus commission). Since all additions would be controlled directly, it would be spam-proof.
Another idea is a completely user-run auction system such as vbay (
http://www.vbulletin.org/forum/showthread.php?t=132544). We would have to restrict software sales, though, to keep out dodgy people.