Amazon has dropped their price for the Western Digital WD100EFAX USD318.88 (~AUD427.28). Shipping to Australia is approx USD10.13 (AUD13.57 - shipping to Regional NSW). Maybe cheaper if you opt to use ParclePoint (or like services.
Price drop was advised to me via email CamelCamelCamel.com product/price watch alert. Previously this unit was USD358.88
https://camelcamelcamel.com/Red-10TB-Hard-Disk-Drive/product…
This is a good price. Current best price on StaticIce.com.au is AUD489.00 from Mwave.com.au (subject to stock availability). I had originally planned to get more WD Red 8TB drives, but at this price point and margin, it was worth my while to upgrade.
Note that this is NOT the PRO version. This is the 5400rpm version. I use these as my preferred drives for my NAS. When in a RAID configuration, it is good to have a spare HDD around in case of HDD failure (rare with these 5400rpm drives).
AUD figures figures based on the current bank FX conversion at the time of this posting. Amazon USA AUD f/x conversions can be higher, however you may get better rates through your bank's credit card (plus 3% transaction f/x fee from MasterCard, VISA).
Product link: https://www.amazon.com/dp/B0719498XY
Barracuda Pro 10TB is $US349.98 (7200RPM, 220MB/s write) for those not using a drive in a NAS.
https://www.amazon.com/Seagate-BarraCuda-3-5-Inch-Internal-S…