Fare has been around for a while (here's the old thread:
AI - MIL-SYD/MEL - 1874 EUR / $2022 USD r/t - Business ). They did increase inventory though.
I checked a week ago and the cheapest flight was 2.5K (up from 1.7k). It's now back to 1.7K but the 22hrs stop on the way back is a dealbreaker.