Custom Website Design - open to bidding

I need you to add a bidding system to my website similar to this: [login to view URL] Its a virtual gaming website and owners of teams are able to bid on their players. I would like to know if its possible for you to do something similar to that and let me know how much you would charge. I do not have my website up yet, so i am just estimating the costs right now. Let me know if this is possible asap. thanks.