Need an Etsy clone, design should be as close to identical as possible while still respecting their copyrights. Should have the same clean layout as far as a small amount of header and menu space in order to leave as much item showcasing space as possible.
Sellers need to be able to accept payments via their personal paypal accounts, and as admin I need to be able to set a certain cost per listing plus a commission fee on sales. Will need to automatically send out monthly statements, with accounts being disabled if the bill isn't paid by the 15th. I can't stress enough how the seller back end features should be an Etsy clone, complete with integrated messaging service so that buyers can't email sellers off-site, and a system for buyers to leave vendors feedback.
If possible, and this might be a long shot, I'd like to be able to cap prices on the site to a certain amount that I can specify, say $20 and under listings only.
I'd like to be able to "hand pick" items for appearing on the home page, and categories should have a top "sponsored" line of items for which vendors can pay extra. Basically, how everything works on etsy it needs to work on this site, if I didn't list some feature they have it's not because I don't need it, I just don't want to list 90 different things. Please reply with references to websites you've built, if you've done a multi-vendor site before this should be right up your alley, thanks!