If you get the car checked out properly and they find nothing wrong with it, I wouldn't see a problem with buying it privately.
Also, have a read: http://www.skylinesaustralia.com/forums/bu...e-f-t35129.html
Welcome to the forum Danny, all the best with the car hunt. I will probbaly see you around if you get it, I have family in Seven Hills and around the area a fair bit.