Consolidated Online Stores

This project description is very high level, as I just want to give the whole picture first and go in details for those, who show interest and experience: I would like a consolidated online store site, where members can sign up, create their own store, but the products would be mixed in with other member’s products within the same category. So visitors would be able to browse categories, however, each category has products from multiple members. When a product is chosen and purchased, the member would receive the money, I would keep a small percentage. I am looking for someone with strong experience in ecommerce/oscommerce sites and payment processing. I would need a super admin panel, and each member should have their admin panel (product list, payment history… etc) The site should be xml feed enabled for those members, who have their own site, so they could just have their products fed over to my site. Also, it should have the manual product upload function for those with few products. Something like [login to view URL] allows individuals to add their items, and when someone buys an item from a third party, the shipping is done by that person. [login to view URL] is just the middle man, what I would like to be. Payment processing should be seamless, but the funds should be transferred to the members account (minus the small percentage fee, that goes to my account). I look forward to examples and recommendations, more details to those who will show the most experience and understanding, relevant work examples. Thank you for your time!!!