I don't doubt it. If you moved from UK to Australia and your car was a generic run of the mill motor it makes more sense to sell and buy new rather than stick on a boat and ship
Not really.
From US to Europe a car can cost between 750 to 2000 USD.
With an average car starting at 10000 USD and can reach up to 40000 USD it's reasonable cheap to transport a car.
http://home.costhelper.com/ship-car-overseas.html
And those prices are reasonable since it takes a few months to arrive.
Sure, prices increase depending on size, these are regular cars. But we are talking about a transport cost.
Say 10-20% of the price including insurance.
We basically pay market price for ship or module when we are talking about Colonia to bubble.