Live auction
 

AJ Auction Pro is the world leader in providing the best Auction
scripts. It grew exponentially from a small start up to a major force
to be reckoned with, all in the span of a few years. AJ Auction Pro is
a fast reliable PHP Auction script built with the sole aim of raising
profits of web masters. It acts as a bridge between the buyers and
sellers offering comprehensive business solutions across the globe as
it is professionally designed and programmed for you.

Sources: http://www.ajauctionpro.com/about_ajauction_pro.php