B2B Catalog similar to alibaba.com / diytrade.com /

We need to develop a B2B catalog system for products & services offered by our clients & their supply chain. Product need to be written in PHP, use MySQL database & able to be hosted on Linux platform. We would like to hear about your previous work which has similar functionality. Catalog systems built on existing open source CMS frameworks are acceptable. If any new functionality that is required to be build can be jointly designed with us. Your quote/bid should only include the functionality that you can provide without major development & delivered ASAP. Please list the functionality/feature list along with your bid/quote please. REQUIRED FUNCTIONALITY: Product catalog Multilevel product categories Post/edit/remove catalog items Details specifications (customisable) for products Rich text editor for product descriptions Categories management (admin) Category templates (admin) Image gallery for products, sell offers & buy offers Catalog management (admin) Advanced search Popular searches Orders Shopping cart Payment gateways: Paypal, Bank transfer, BPay Buyer tools Sell offers Buys offers Post/edit/remove sell offers Post/edit/remove buy offers Search/edit/delete sell/buy offers (admin) Seller tools Alerts & notifications Internal messaging including inbox & outbox Contact list Search/edit/delete messages/forums/alerts/feedback (admin) Sub-domain for each user for company profile Company profiles with logos Search/edit/approve company profiles (admin) Templates based on users / companies Company rating system / feedback Registration with emails based validation with password retrieval View/edit/delete/search members (admin) Manage service or membership levels (admin) Manage fees/subscriptions (admin) NICE TO HAVE: Newsletter subscription Newsletter management (admin) Sitemap Configurable themes Inquiries about products Favourites list / watch list Usage statistics RSS feeds Live help/chat (admin) Advertisements with banners, text ads, etc Advertising management (admin) Trade show Success stories