For those members in Oz, we found no difficulty in getting one of the well-known suppliers happy to sell us a 8300. You need a US address for delivery, maybe "Ship it To" would handle a big item like this. But there are international freight handlers who move stuff like this all the time in the US and Oz.
You would be up for GST but that's only another 10%. The other problem is that you're without a useable warranty. But at US/AUD parity, $12,000 less $2,300 you would be so far in front even after freight that a breakdown, if it happened, wouldn't be hard to pay for.
Perhaps a useful example, but not accurate, is that shipping a Mustang from the US to Oz is about $3,500.
If a large printer cost similar your landed cost would be 3500 + 2300 + (0.1 x 2300) = 6030, or a saving of nearly $6000. My guess is that the printer would cost less than a Mustang to freight.
I looked very carefully into buying an 8300 from the US and freighting it to Australia (best price I could get an IPF8300 locally in Aust for was $9000 inc. GST). B&H quote $3500 for freight to Australia; which is expensive shipping and I am sure you can get cheaper if you shopped it. I doubt it would be much cheaper though. Shipping a car is a different story as you buy a container and it goes by sea. Shipping a printer like the 8300 by air is a different kettle of fish.
Once imported you pay GST on the whole component - including freight + customs clearance fees. Its anything but trivial. You are not eligable for the US rebate if printer is shipped outside of USA so you dont get the extra $1000 off.
The US are 110 volt so you need a step down transformer to run the printer here in Australia - a good step down is a couple of hundred dollars at least.
No local warranty on the printer in Australia. Imagine freighting it to Oz and finding there is a problem! These are complex machines with lots of moving parts.
Resale value - no one in Oz is going to want a used 110volt no warranty machine.
I am not saying you cant import an 8300 for less than it will cost to buy one locally - because you can. What I am saying is that it just isn't worth it on this kind of purchase. Local warranty and support is just king in this regard. Which really sucks as we get gouged in Australia on these printers compared to the US.
There are some good deals to be had in Oz - you just have to beat up the resellers with a big stick. I just paid $5,500 inc. GST for a Canon IPF6350 (which is a 6300 but with inbuilt hard drive) and it came with a free Canon 7D and 18-135IS lens with full Aussie warranty. I ebayed the camera and lens as I didnt need them and got $2000 for them - so printer cost me $3,500. For an IPF6350 in Australia that is a phenomenal price and way less than importing one from the US. At the time I bought the 6350 the 8300 was being offered with a free 5D MKII and lens in Australia. You could have payed $9000 for the printer, ebayed the camera and lens and ended up paying around $6000 - now that is less than importing one from the US and with local warranty.