You can go through a month's worth of classified newspaper advertisements, check the notice boards and the grocery stores, read the motorbike trader magazines and ask everyone you know at work.
It doesn't matter if you're looking for a particular make and model or if you're primarily concerned with price.
You'll find everything you need to find the right motorbike at the perfect price.
The listings include late model winners like the 2005 Gran Con T.
There you'll find a comprehensive series of listings featuring every 2005 Cagiva Gran Con T and every other motorcycle in Darwin, Canberra, Sydney, Brisbane, Adelaide and Perth.
Fortunately, that information isn't hard to find.