Previously posted here: https://www.ozbargain.com.au/node/465518
Apparently they're used drives 'recertified' (based on previous deal and reviews) but I thought I'd still post the deal given the price.
Edit: As can be observed in the comments here and the reviews on amazon these are likely quite dodgy, so buy with caution if at all.
These are 2nd hand drive, seem to have bad review, I'll give this one a pass.