Used car fair/auction in Sydney?

Travel Info
We're interested in buying a car in Sydney, does anyone know of a car fair/auction in the area? We found a great used car fair while in New Zealand, which was held every Saturday, where we were able to find a decent car for our vacation use. We're hoping to find the same thing in Sydney. Any help would be appreciated!!

Travel Tips

as far as I know there are regular things like this in Kings Cross and I'm sure if you do a search on google you can find what you are looking for, would you be able to send me the details for the NZ one please we are going there in august for a month

thanks
Mitch

Others
maybe you should check out this website...
has many used carss...
http://www.tradecarview.com/
iam sure you will find a decent car for a reasonable price...
I would go to http://www.sellchamp.com go to their car auction section. They offer some very valuable Car Auction tips.
http://www.sellchamp.com