GreenboxIT has HDDs on sale today. Last time I saw the sale I waited until I got home to discuss it with the wife… And the deal ended, so this might evaporate any time.
Most 3.5" HDDs are on sale, although the best price is on the 3TB Seagate 7200RPM drive at $122. Not as good as the $109 I saw it for last time (I'm still kicking myself!)
Note that the security certificate is expired for almost a year, and when I tried to pay with Paypal, it directed me to the sandbox (test) site where I don't have an account, so there was a moment of panic at this being a scam… But I cancelled the payment (got confirmation email and everything) and then paid with the 'Paypal express' option and it all worked fine.
Pickup only from Adelaide, Sydney and Brisbane I think. Unless you want to pay $100+ for shipping…
MSY - $125 currently, so not really worth jumping at to be honest
and $128 for WD Green.
Personally I prefer WD, I've had failures with Seagate drives, haven't with WD