I brought a C3 back and got it delivered from CA to Syd for $2950 shipping.
This included crating and packing the vehicle in a 20' container.
Then once landed here you will have to pay cleaning, quarantine and 10% gst on the buy price of the vehicle.
The costs above excl the 10% came to about $250
About 6 weeks for delivery.
Thats all.
If you decide to bring something back and you want to include other parts, just make sure that they are packed in the car. I had some loose items that arrived at the container yard seperately to the car, and one part decided to go walking which cost me about $650 extra. Luckily I got the shipping for free.