if it is crated ensure it is import safe (timber crate material) otherwise it will be quarantined and you could cop storage fees, import duties normally look at the volume of a box not the weight, invoice value (lower the better but needs to be original) and if it is coin operated as there is a entertainment tax so get them to state maybe parts so to avoid that duty tax.
this guy on the Central Coast at one stage was offering share importing where if you can get you item shipped to his warehouse in I think California you could share in his shipping container for a fee. Though not sure if he still offers it or how reliable he is.
http://www.ebay.com.au/usr/american-cool-stuff-imports
