I too am an Aussie.
be very, very careful about dealing with Australian Customs.
they have their own, rather bizarre, method of determining which blades can be imported without a permit and which ones need a permit.
sometimes, these decisions and definitions will change while your blade is en-route for no apparant reason.
for example, all Benchmade knives with the AXIS Lock mechanism are classified as Prohibited Imports.
i'd suggest trying to source a knife from a local dealer where possible. it may cost you a couple of bucks extra, but at least all the customs issues are sorted out for you.
check the
Asian and Australian Knife Community forum for some ideas on suppliers.
if you shop around, buying from some Australian dealers only adds maybe $5 in every $100 compared to importing them yourself.
personally, i'll just cough up that extra $5 and let someone else deal with Customs for me.