Ive done my figures on a catalina 38 from west coast USA to Brissy. In US dollars. Boat around 50K
Transport with Dockwisw 17K after 20% early payment
Duty in Aus nil ( free trade agreement)
GST 10% total purchase and transport cost
Antifoul, clean and fumigate in US. AQIS will consider this when inspectinig.