Exactly Matt.
We pay like twice as much to buy parts from overseas. E.g. Pair of Wee Bars 59.90Euro which is equal to $117.90 Aus. Thats just for the bars. Imagine what the price for shipping costs.
Companys can also sell their products in their own thread. ie. Aus Scooter Parts, SOA, ACS.
It just makes less hassle of emailing everyone thats selling something "Do you ship to Australia" and half of the time the answer is NO.