I can confirm that it is far more expensive to import then to buy locally (I'm finishing importing myself as a type this, car gets rego'd next week). Because importing can be a legnthy process (months obviously) you end up buying more and more stuff for your car before it has even arrived (E.g Bonnet, Wheels, Seats, Coilovers, Boost Controllers, Air Filters, BOVs, Ganadors...). In the end what you saved on your car you spent on mods and then some before you can even fit them