Depends on the car itself.
You will be hard to fine a non V-Spec / V-Spec II with low-ish Km's as they are moving on to being a 15 year old car...
Lowest at the moment I have seen a R34 GTR with 44,000 km's for $44,500:
http://www.prestigemotorsport.com.au/stock/show_car.php?id=672
Or 66,000 km's for $35,900:
http://www.prestigemotorsport.com.au/stock/show_car.php?id=616
Thanks