E-commerce website

I need a website similar to [login to view URL], but instead of products being bid on, I will have them raffled on. For each product there will be a predetermined no of available tickets for sale. Each product will have underneath it the number of tickets needed to enter that specific raffle, the number of tickets still available for sale, and an 'Enter to Win' button. Each buser account will display the current raffles in each the user bought tickets and the status on them ('won' or 'try again'), and amount of unused tickets. Users will be able to buy tickets in the following manner: $5 - 10 tickets $10- 20 tickets +2 free $20 - 40 tickets +5 free More details to come.