Also Vector Sail Works has there Blade F16 at US$12,900 excluding import duty, and shipping it would be around $15,000 (Australian Dollars)
Not to disagree with your main point, but assuming you would have to pay 10% GST and with the AUD at less than 0.85USD, you're up for at least A$16.7k before you add shipping. With shipping, it's probably somewhere close to Wouter's suggested number for the Viper, but still a long way south of A24k.
Mark.