Seagate Iron Wolf 12TB
As per the title, this seems to be a reasonable price for a Seagate Iron Wolf 12TB (ST12000VN0008) drive delivered (and one of the few decent deals in the eBay 21% off sale lineup) which is approximately $41.6 per TB. Whilst it is tempting, I think I'll go for one of the recent 16TB shuckable deals, but this is a good option for those who really want that Iron Wolf drive.
It appears you can save more if you buy multiple drives as well ("Buy 2 for AU$619.36 each, Buy 3 for AU$613.04 each") which you can then use the same 21% off coupon up to a maximum saving of $300.
Seagate Iron Wolf 16TB (updated 2/9/20 6:45pm to reflect small price drop)
For those who want the 16TB drive (ST16000NE000), they are $828.71 from Futu_Online as well with the same coupon code. This is a much more expensive $51.79 per TB. https://www.ebay.com.au/itm/Seagate-16TB-IronWolf-PRO-NAS-HD…
I just grabbed 2 x WD Red 8TB's for $301ea from Futu which i thought was great.
https://www.ebay.com.au/itm/WD-Caviar-Red-8TB-Internal-NAS-H…
$389 ea
2 for $381.22 ea
minus the 21%