Well... I am not Australian but I probably know more about importing to Australia than the average Australian.
There are two types of vehicles you can import to Australia.
1988 and older - Australia use to have a 15yr import rule same as Canada. About three years ago this was changed to, no vehicle newer than Dec 1988 could be imported without restriction.
So... today... you can import any vehicle Dec 1988 and older with no restriction.
RAWS (Registered Automotive Workshop).
This was introduced back in 2003, where you can import a vehicle under the RAWS system.
Only a certain number of vehicles are eligible and each RAWS workshop can only import and plate 100 vehicles per year, per category.
The idea of this system was to slow the number of vehicle being import and to date there are approximately 400 RAWS workshops.
The government said it is in place due to safety...... but many will disagree with this.
A RAWS workshop charge between AU$1,500 - 4,000 for compliance. Basically, the workshop with check the vehicle for accident/repaired, the vehicle meets Australian Design Rules (ADR) where in some cases certain things need replacing like seat belts, fitting of child restraints, etc. The RAWS workshop is responsible for the vehicle for 10yrs and any recalls are their responsibility.
To become a RAW is not easy and costs a small fortune which the government made it like this to help slow the imports down. One out of five RAWS workshops only last their first year as the pressure, paperwork and fees involved certainly sort the boys out from the men.
If you visit the link below you will be able to see what make and models are allowed to be imported.
http://raws.dotars.gov.au/rawswebpublic/RAWPubSearch.asp
These include vehicles like Supra (JZA80), Skyline (ECR32/33, ER34, CPV35), Delica (1994-new) etc.
Because the Australia is restricted to certain models, the demand is high for vehicles like Supra RZ 6spd's, Skyline ECR33 Coupe 5spd's.
Under the RAWS system, you cannot import a vehicle that is accident/repaired which is why good straight Supra RZ 6spd's fetches such big money here in Japan. The vehicle cannot be modified although every RAWS workshop has standard parts for fitting to comply the vehicle and then removing. It is bending the rules... but..... all workshops do it.
I have been involved with RAWS since the beginning and am in fact a partner in a RAWS workshop in Australia.
If you want any further info...... ask and if I have time I will reply.
Cheers
MB..