Ecommerce Site with MySace features

I would like a site where users can sign up and create an online storefront to sell products, similar to www.RedBubble.com. Here are just a few of the many features I would require: - Control panel for users to create custom storefronts - Shopping Cart and PayPal - Admin backend - Feedback - Forum I will provide more details and an outline of the site to bidders with working sites/demos that relate to this project. Serious inquires only. Please do not copy and paste a generic response.