buy and sell Facebook pages

I need to build a special marketplace to buy and sell Facebook pages. it will like this site [login to view URL] but with more creative features For : Sellers: Post Facebook page URL Sift through offers made by interested buyers Contact interested buyers in private using a messaging system Buyers: Sort Facebook pages for sale by category, price or like count Make offers on Facebook pages for sale Contact sellers in private using a messaging system payment system will be like Fiverr Idea " hold payment till buyer confirm he received his need " with fabulous homepage design and a powerful admin-panel Want this done within 1-3 days not more