Pls dont award before discussing.E-Commerce website but work as a auction site, nice thought. I will be able to use my e-commerce development experience into your application. I have gone through with your given link and understand as well what you want to do for your website.
Now, the first thing is we will have to integrate a e-commerce site and where we will have to first think about that you will upload the products or there will be an option of vendor registration? Actually, vendor will register in the site and will be able to upload their products. In time of Upload a product user have to mentioned the criteria like Category, Condition, region, Werehouse, Auction Type, LOT price, Seller, Retail Price, shipping option and the lot size.
In respect of End User, they will be able to Browse their products according to their desired product. Then they will be able to bid the product. Before placed the bid into this user needs to register into the site this is mandatory.
User will be able to see the Seller Performance Report before placed the Bid against an auction title.
If we will conclude then there will be three types of users Website Admin, Seller and Buyer. Seller and buyer contain their profile pages as well. Seller will be able to see the order history and the shipping history and at the same time buyer will get the transaction history from the profile.
The thing is that we are very much open to discuss on this further and please let us know if you need reference