It may as well be cheaper just to fly to America, organise shipping and get it back to Australia, and then convert it to RHD as well as make any other minor adjustments needed to make it Australian roadworthy...
I'm going to guess that it wouldn't be a good way to go about it. Generally speaking, the newer models made by Ford or GM (just as an example) use the same safety and emissions standards between the US and Australia (its one of the reasons why the Monaro was brought here so quickly). But converting everything over to RHD really isn't worth it... And you likely won't save any money by the end. Plus, won't your government end up taxing the purchase of the vehicle upon arrival? I know the US Feds do...
Casio
It might also have something to do with the cost of producing a car locally vs imports.
I would think that it plays into the equation, but its normally much cheaper to produce and sell a vehicle locally than to import one. That Chrysler is actually built in Canada and shipped to Australia (if I'm not mistaken), so Chrysler ends up making much less money than say Ford or GM who can build a similarly priced wagon in Oz, and have delivery costs that are probably a fifth of that of the American model.
But, keep in mind as well, Oz is becoming a place in which many of the Automakers actually
want to build their cars to ship them around the world. You guys will be building our Pontiac G8s, and possibly our Buick Roadmasters as well (that is, if GM approves), and if the Falcon rumors are true, our versions will come from Oz as well. And truth be told, we won't pay much more for the cars than what you would down there.
Picklesam
Why would you guys pay $35k for a commodore? If you've got the contacts you can get a second hand merc cl55 for less than that at auctions..
Actually, prices have yet to be confirmed, but a well-equipped Pontiac G8 GT (6.0L 362 BHP L76 V8) should push right up to that point, but I'd be willing to bet that you could get a pretty "basic" G8 GT for right around $30K. I believe it will be the equal to the SS model, as the SS-V package probably won't be available right away, depending on how well Pontiac can sell the vehicles.
IMO, its a screaming good deal. While Dodge does offer the Charger R/T for about the same price, you're getting an extra 20 BHP, a manual transmission option, a better chassis, and an overall better drive. Furthermore, you get a 5 year, 100K mile warranty, which on the Mercedes that you mentioned, wouldn't exist... And, at least in my book, I wouldn't want to have to pay to fix a Mercedes.
That, simply put, is common sense.