Had this monitor in my wishlist from when i was purchasing monitors about a year ago. Just got an email saying it's now on sale. I have seen it go to $249 many times and i think maybe once even to $199, but this is definitely the best price it's ever been and the best price ever for a 144hz monitor.
I remember looking at reviews when i originally found this monitor and heard it was pretty good especially for the price (and that was at $249, so even more so now at this price). this is nearly down to what you pay for cheap 60hz monitors, so this is a crazy price.
Postage to melbourne suburbs is around $12 from what i can see, so seems pretty good. Plus there is Shipster you can sign up to for free kogan postage.
EDIT: Another user Scrimshaw pointed out that it is slightly cheaper again on Kogans ebay store. $176 using the PICK5 code, and for me it is free shipping so if it is the same for you its a much better choice. See his post for links and info.
The ebay listing may be cheaper for some. $175.99 after PICK5 code.
There are a few mentions of it on Reddit. Here and here and a WP one here