To import this sort of thing, you are also likely to need to use the services of a customs broker/importer which would also incur additional fees (fees to them, airport terminal fees etc). Likely to be around $600-700 from my experience. What is very important is knowing what Incoterms the supplier is selling to you at eg. DDP, EXW, CIF etc. this makes a very large difference to responsibilities - particularly import costs once it reaches Australia.