Sounds cheep to me. I did find this article. Maybe I'm comparing apples to oranges.
In 2013, the ACMA held the digital dividend auction, which offered 2x45 MHz of spectrum (703–748 and 758–803 MHz) in the 700 MHz band (the digital dividend). Two bidders, Optus Mobile and Telstra secured spectrum in the 700 MHz band in the auction for which they paid nearly $2 billion.