Agree with above, it all really depends how good your contact is at the other end and how helpful they want to be.
IF you used the RS bike below for sale @ $3000 USD as example,
convert the price to AUD,
add the $300 to truck,
$1500 shipping and fees
$300 trasport in Au and a few Customs unknows
it will owe you roughly again what you paid for it, the only variable in there is the customs and the how you word the dec, parts is cheaper no duty etc, but all the other stuff is a fixed cost.
So depending on what you want to pay will detirmine how you send it and who you should use.