In Reply to: Depends on a couple of things posted by scooter on Wednesday, 29. September 2010 at 17:27 Bali Time:
The GST is calculated on the total including the freight. Also, if customs decide that your feature is worth more than $1000, even if that's not what you paid for it, they will put a value on it and charge you based on that.
The value is converted to AUD at the day of import (arrival) using rates published by customs.