Ajax / Comet Real-Time Auction

I am looking for a custom auction project. If you do not have experience with auction projects and do not know the overall auction process from start to finish, please do not bid. I am open to a PHP / Mysql or ASP MsSql solution My requirements are: • Real time updates and bidding. The user does not have to refresh the page to see the change in the bidding. • Fully integrated and customisable interface • Online payment integration – users can pay for the items online. • Payment reconciliation – users will be able to see what payments have been made. • Live absentee bid table. • API – a means with which external applications can access information held within the auction system. • Complete event / auction management. Multiple auction items per event, event calendar. Additional details and samples will be provided to qualified applicants