You'll see what's available in Canberra, Perth, Adelaide, Darwin, Melbourne and Sydney.
There's an alternative, though.
There are few better places to find a cheap used motorcycle than Phillip Island, Bendigo, Lakes Entrance, Lorne, Mornington Peninsula and Shepparton.
What are you looking for? A late model Ducati 70? You can find one at a great price.
That's not an issue.