Joomla sales site php / db programming

I'm looking for a programmer to build up a sales system for Joomla! Essentially the same functionality as [login to view URL] The work that needs to be done is back-end PHP / MySQL. Design and front end code will be provided. This project is not for resale, if you feel a 3rd party extension would help shorten development time or cost please let me know. I'm happy to hear it. Required features - User uploadable items (for sale) - User profile page (already exists in Joomla, just needs customizing) - User portfolio page (list of items user uploaded, already exists) - User dashboard showing sales, pageviews, comments etc. (only raw data output is required here, front end graphs and things will be programmed our side) - Admin approval of all uploaded items - Admin dashboard showing sales, pageviews etc. - Ratings on items - Comments on items - Sales from items paid to us, commission calculated and remainder paid on to user - List view of items in categories (items could be extensions of articles displaying in standard Joomla categories) - Integration with standard Joomla! search I'm looking for someone who has experience with Joomla! and can produce efficient well integrated code. If this project is successful there will be ongoing work for the freelancer. A project management system with bug tracker and customizable cloud server will be provided for development. ** NOTE ** At this time I'm only requesting a quote for work. The project will not start for another 4 weeks minimum.