Hi Phil and welcome!
By no means am I an expert, but you would tend to find Australian cars are a lot more expensive than their USA counterparts. Finding a low mileage car is not that uncommon - and especially in Australia, where there are fairly strict rules about driving LHD cars. I'm sure others on here can tell you horror stories about trying to actually use a car that has been sat for 25+ years. Would you plan on driving this car a lot?
Vin 15999 is listed as still being in Utah, USA, so I would guess it hasn't been in Australia for ages. I would also guess that the reserve is going to be HIGH!:
http://www.justauto.com.au/justcars/buy ... d14177c096 - that is it listed elsewhere for £50,000!
Regarding importing - unfortunately Australia is no different to America. You are looking at shipping of around £2000, then V.A.T. of 17.5% added to the cost of the car and shipping.