shoping cart to sell digital&physical item ebay integration

Hi, I want a shopping cart to sell digital and physical item on my store which should have following extra feature from normal design/feature: 1. Multiple vendors/seller Multi channel supported in a single store. ( ie. other customer/seller also sell item from my cart ). 2. Full eBay integration. (i.e me and my customer/seller can list/schedule/import item from [login to view URL]). 3. Automated digital delivery for digital download products. Customer should get secure download link by email after making payment through paypal. 4. Bulk product and Image Upload for admin and sellers. 5. Multiple themes support - Admin can set different themes so the site appearance changes. 6. Single checkout for digital products (without user registration). 7. Customer support ticket system. 8. Seller can promote their item through affiliates link ( products which in store), 9. Admin can set fixed monthly or different commission for seller. 10. Seller can upload files pdf or zip. 11. Sell downloadable digital products like ebooks, software, pictures, templates etc.. 12. Support For Digital Products as well as physical products . 13. Multiple payment gates ways supported - Accept payments through [login to view URL], PayPal, Worldpay, YourPay and Google Checkout . 14. RSS Feeds for new product additions, seller updates to search engine feeds. 15. 100% Web based manager for sellers and website administrator 16. Ability to set different commission rates for different sellers. [login to view URL] automated or manual approval of sellers, buyers and products for complete control over the site operation . 18. Full source code. We can customize the site as needed. 19. Newsletters to sellers and customers . [login to view URL] Features. Template Management - Change look and feel of the sites with built in layouts. Using the customizable templates further modify look and feel of your site * Individual product manager panel for each sellers. * Supports unlimited vendors * Sellers can add, edit products images and prices. * Affiliate programs to market your stores * Individual control panels for sellers End User Features * Customer profiles and order history * Real-time order tracking for customers * Product Purchased - Displays the product purchase count for each product. * Customer Orders Total - Generates a report of total order amount of each customer. * Gift Coupon - Report shows who purchased the gift coupon, details of products purchased with gift coupon and also displays the gift coupon balance amount. This is my requirements to build up shopping cart. This shopping cart can be build up with any open source shopping cart preference is osCommerce, cube-cart, zen-cart or make some single extension/addons also or provide through word-press plug-in and themes. or any single" all in One Shopping Cart" It 100% should me controlled and managed through admin cpanel interface and available database and other software only. I just want combine feature of payloadz.com+vendio.com+[login to view URL] It should be flexible modification/up-gradation if any other feature required then it can be modified in future. Thanks