Not sure of a good place to buy from but we have recently bought a new car. We got it from the mitsubishi dealership on north east road (it was a ford escape someone had part ex'd against a new mitsubishi, not super cheap but well priced and we were pleased with the service).
Also, we still have our previous car which we have just put up for sale. We were going to keep it as a car for the family to use when they visit, but to be honest we could use the extra cash! It is a Holden (ahem, Vauxhall!) Astra, 2003, up for $5000. Shoot us a pm if you're interested