UPDATE - they have dropped the price by $4 and shipping is now free. Bargain.
Cheapest price on static ice - $372 (extra with delivery).
Advertised as 20% off.
Seems like a good deal for a well regarded drive. Previous best OzBargain deal for this was $326 (https://www.ozbargain.com.au/node/241021) in March 2016.
Deskstar® NAS 6TB High Performance Hard Drive for Desktop NAS Systems 6TB
3.5-inch hard drive for use with NAS systems, featuring a 6Gb/s SATA interface
Features an active Rotational Vibration Safegaurd (RVS) mechanism to help improve performance and decrease wear and tear.
7200 RPM and 64MB cache, up to 20% Faster than other 5400 RPM hard drives
1M MTBF
24/7 availability
Supports advanced power management and error recovery control
3-Year limited warrant
I think the highly regarded HGST drivers were the "coolspin" models which have been removed from sale for a while now, hopefully somebody knows for sure if these are worth the premium for the HGST name.