If there is award availability, purchase 20,000 AA miles for USD505.69 and can redeem for a 1 way in business class . For a r/t journey 40,000 miles will cost USD981.38

Add AUD45.28 in taxes each way

Total cost one way approx AUD767 and roundtrip for approx AUD1403

Personally, I would just fly economy at those prices, but they are still a lot cheaper than buying direct