Sales site, single store to multiple PHP

Hello coders, I have a very simple store site that was made in PHP and MYSQL. It sells high end machines so there is no cart or check out. What I would like to do is make this system support muliple stores/shops. Like lest say you own your own sales lot, you can signup on my site and then be able to create a store profile (logo, color scheme, info such as address, etc). Then you would have your own admin area for your inventory and to update your info. This is very simular to like an ebay or yahoo store. People can search, inventory based on seller name or all sellers. They can also browse based on basic search cryteria. They will get a list of items avliable (simular to the one currently on the site) and be able to click that item and get a sales profile for that machine. There should be a 'contact us on this item' type button that goes to a form where the browser can submit their info and ask for an email or call back. The company info should also be on that form so they may call direct if they like. If the form is submitted, it should show the info for the item they were looking at as well. The front page will have a list of featured dealers (3) and featured items (5). It will also have a search box with advanced options, like type of machine, etc. I think this is the bulk of it, please let me know if you have any questions. Oh yes, the sellers can make an account but it is not activated until they use paypal to to subscribe. I can help with that portion if needed (the paypal transaction). See attachment for a link to the current site that needs to be converted. If you would prefer to start this fresh with your own code, I am open to that as well. Just let me know. ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables): a) For web sites or other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). ## Platform mysql, php.