Ah, so it's a business! From the title I thought it was just a domain purchase, that would be the greatest (disclosed) ever by a significant amount if it was.
The headline makes it sound like they bought the domain name for that figure, which is sensationalist and inaccurate.
("Amazon.com, Inc." is the name of the company.)
http://singularityhub.com/2010/06/10/whats-the-secret-behind...
I certainly don't think the title is sensationalist, but for the sake of clarity (given the up/down votes of complaints such as yours) perhaps it should have been made more clear that a company was purchased and not a domain name. On the other hand, would there be any confusion if it was Zappos.com?