Car buying in Australia

[diluculophile]

I occasionally find cars for friends and family as I'm mildly obsessed, and spend half my time looking for cars I can't afford anyway.
My ex has asked me about finding her a car, and although I've offered suggestions on the kinds of car she could get, I'm having more difficulty locating specific cars as she has emigrated to Australia.

So far, I've been looking at carbuyer.com.au and autotrader.com.au.

In the uk, I generally start with pistonheads and autotrader, and then maybe car and classic etc if it's pretty specific.

Anyone in Auz (or who has bought cars there before) know of good websites to look at?
I generally avoid the gumtrees and eBay's of this world - at least for vehicular purchases

If it helps, the region is Queensland, Sunshine Coast.
(Looking for an ordinary small auto hatchback - my top choice at present is a Fiesta)

Thanks