Personally pulled the trigger for $207.82, by making use of the 10% cashback $30 cap offer from Zip Pay.
(I bought 2x $100 Amazon gift cards + $100 worth of other stuff)
The cheapest posted on OzBargain is $221.50
Camelx3 Australia has the cheapest at $221.38
Amazon: "Your account will only be charged when we ship the item."
Not much to lose when you can cancel up if you ever manage to find a better offer beforehand.
Important note for those who don't need the 64GB upgrade-ability in the future, the 2x8gb (16GB) model has gone down to $76.06 before, which may be more suitable for some people if it ever shows up again.
Edit 6/1: Available again $229.85 (Was $227.82) and expired since 20/12 12pm.
Edit 12/01/2021: Pre-orders open again at $227.94.
I got this same deal earlier in the year, I received single rank DIMMs, if that's relevant to you.