285258 Used Cars - PHP & MySQL needed

Hello, I want to build a website based on used cars ads. I'll have 2 types of users, private sellers and dealers. They both have usr/pass/phone/zipcode, and the dealer have some extra info. I'll have the homepage, where we'll dislay latest posts, a search form, and cars listed by make/model. The user can search a car by various conditions (make/model, budget, Year, zip code (fix and with radius) or by post ID). We'll have a page for search results, with a form where the user can refine his search. Then the car page, with photo gallery, details, contact vendor, send to a friend, add to favorites, report abuse, etc. Then we'll have the dealers section where we;ll have a list wil dealers, and where they can be refined by mark/model or zip. Each dealer will have its own page, with his cars, contact page, details page, map, etc. We'll have extra, the My admin page, where the user we'll manage his ads, his favorites, password, details. A contact page for general questions, A small admin for me where i can browse cars, users, etc, where i can suspend an ad, etc. For all these i have design/html/css, each type of page is ready, and also, i have ready a large part of database, i'm not sure it's in the best shape, but it has some structure. More details upon request.