Domain/Website Auction site

This project is about domain/website auction website. I am looking into creating a website that is similiar to flippa.com. It would be an auction website, capable of realtime bidding and tracking of domain names, and websites to start. 1. Most of features of Flippa & looking for few more i have planned would discuss later point of time. 2. I need design in HTML5 & CSS3. 3. Strictly shouldn't use any of already available clone. I am not looking at any clone but will pick certain features. Please PM your auction sites. I am not interested in any clones or already available in warez or downloads etc.