B2B Protal / Marketplace

Building up a B2B Portal, similar to Alibaba, as quick as possible. We want all functions [login to view URL] script has; in addition we need more features, the main features listed as below: 1. Look and feel similar to Alibaba. 2. Powerful Searching & Browsing Capabilities 3. Personal Messaging System, supervised by Admin 4. News post & management 5. Forum Integrated 6. Email Alert Notification 7. Category management 8. Banner Ads Management 9. User Registration & Controls 10. Multi-Lingual ability 11. Search engine optimization 12. Modular design (Ability to add and remove modules without causing other modules to stop working) 13. Easy installation 14. Easy upgrade, remove and new modules implementation Script should be designed in PHP. Database in MySQL. Full source code should be handed over at the end of the project. Need professionals to do the job. The code should be flexible, easily upgradeable and very very well commented. This project is not open for development from scratch. I am only interested in already existing solutions, so do not send a PMB if you do not have a fully working Demo for both the admin and the site. Do not PMB me any other stuff. Just previous b2b work including fully working Demos, and any queries you have. Bidders with no reference to previous 'online B2B portal' please do not waste your / my time Maximum Budget is $500. Payment will be made only when the project is completed as we have made bad experience. Please do not PMB if this is not possible for you. If we are fully satisfied, following pending projects could be granted as well. Thanks GLT