Thought that it is a cheap price as I would normally bought for $9.95 when it was on sale at Supercheap Auto, but looks like not easy to find the stock at WA store (at least South of River area that I can see). I managed to secure 1 from Ebay (using my Ebayplus $5 coupon), thus it comes down to $3.
Hopefully you could find stock from your local store. Best bet will be delivery option OR you could choose Nulon brand which has the same price and more available stocks :
https://www.supercheapauto.com.au/p/nulon-nulon-xtreme-perfo…
This is one of those things you dont need to think about too much.
No brand wants to be responsible for a brake failure.
Unless you're buying race specific blends, let your wallet decide :)