I have had good service from o/s companies, and would buy from them again without a problem.
Depending on the total cost of your purchase in AU$, if under $1000 as mentioned, you will not pay any extra on top of the suppliers price to get it here.
If it is over the $1000 mark customs and the government stick their hands out for their cut of the pie.
As far as damage is concerned, if it is clearly faulty on arrival, email the supplier with info and pics straight away, maybe an idea would be some kind of postal insurance, again that would be dependant on the items cost.
When it comes to after sale support, i would be asking that before the purchase if it is not advertised on their site, again, with small purchases, forums like this one can be better than a boomerang of emails in cyberspace, to get the answers and support needed.
To be honest, apart from my purchase of the ED80, from a good supplier here in Melb, and Syd, i have had better service from the o/s companies, but thats another story