[serge]

I guess that rather depends on the condition of a particular car and its service history.
Common view is to buy a car that has been driven regularly, not sitting in the garage - at least 3000 kms per year is where you want to be. Service history should be comprehensive for at least 3-5 recent years, to give you and your mechanic an idea of what has been done to the car and what may be coming up.
Another general recommendation is to buy a post 2002 car, apparently some design changes were introduced to address issues with the earlier cars.
The jury is out on the aussie delivered vs import (usually UK) cars - import cars are usually cheaper and apparently (hello PP!) harder to sell. My car is an import, I bought it in UK and had it shipped over and complied here, so my view is slightly biased by this fact When looking at an import car, check for oxidisation and corrosion on the bodywork and parts exposed to salt on the roads
Ferrarichat has a good write up on what to look for when buying a used 360, have a read: http://www.ferrarichat.com/forum/360-430/191837-faq-shopping-used-360-a.html