Build a Classifieds Listings Website

First of all it can be a plugin for Wordpress, Joomla or another secure CMS. My Requirements: - Homepage o Navigation categories with dropdown menu: o Sign up/Login (Facebook & Twitter) o Search Box + Category + Search Button o Thumbnail Preview of last 4 posts for each category o Except categories, Contact us and FAQ should be included also o Facebook plugin in footer - User Account o Profile  First Name, Last Name, Tel., Email, Address, Date of birth, Security checkbox  My Posts, with ability to modify them and change they order and date of post.  ↑ Sign- If price have gone up after changes made.  ↓ Sign - If price have gone down after changes made.  Each post should be approved by administrator.  After user posts an product the this message will appear “ Thank you for posting. Your post will be approved by the administrator in less than 24 hours.” o Saved Items – if users want to save certain products for later usage. o Chat – which tells if the seller is online so that the buyer can immediately reach them, or if he is offline, he will receive the message in his/her email. - Product Posts o Page where users can see the product. o For the automobile category, the following info should be included  Title, Name,Tel., Address, Kilometers passed, Description, Price, Photos (2 MB max, 6 pics max ).  Option to save item and contact the seller. o For categories other than automobile  Title, Name, Tel., Address, Description, Price, Photos (2 MB max, 6 pics max).  Option to save item and contact the seller. - Product List Page o In the product list page should be included:  Product picture  Title  City of the seller.