HGST's helium-filled He6 6TB hard drive selling for $800
 

HGST introduced the Ultrastar He6 6TB in November. The drive is not only the first to offer 6TB of storage in a single 3.5" chassis, but also the first to be filled with helium. Although the He6 was initially available only to a "select group of customers," it's now popped up at a couple of online outlets. DiscountTechnology is selling the SAS version for $895, while Amazon partner Memory Expo USA has the SATA incarnation for $798. Both vendors have drives in stock.

http://techreport.com/news/25980/hgs...elling-for-800