Tmart has this indoor VHF UHF HDTV Antenna on sale with price US $12.20 (~AU $16.30), the important parameters can be check below:
Working Frequency: VHF(172-240Mhz) \ UHF(470-860Mhz)
Impedance: 75 Ω
LNA Gain: 25dB
Reception Range:50 miles
It is easy to install and normally you can get about 30 or above channel in Australia. Hope you would like and need this antenna.