Was reminiscing and cursing myself the other day for not ordering the Everki flight when Auspost was doing it for $32 (https://www.ozbargain.com.au/node/115333)
I did a search online for it the other day and the good guys are selling it even cheaper than previously posted approximately one month ago (https://www.ozbargain.com.au/node/143601)
Although it's not quite $32, I don't think you can go wrong for < $50 delivered to your door.
Bit the bullet and bought it last night. It's already packed and on the way.
Just be aware that checkpoint friendly bags (although a great idea) are useless in Australia. I've had to take my laptop out of the sleeve every time I've traveled domestic or international when passing through Australian customs in the last few years. Other countries are a bit hit and miss (but mainly ok).