From Amazon:
Designed for deep bass performance
Comfortable, secure fit with adjustable headband and multi-pivoting earplates
Two adjustable temporal-comfort zone pads shift the pressure and perfectly balance the ear plates on your ear
Collapsible for maximum portability, includes carrying case
Connector Type: 1 x Headphones (mini-phone stereo 3.5 mm)
To Canberra, it worked out to USD 24.99 + USD 6.19.
This get converted to AUD 30.49 + AUD 7.56 using the Amazon Currency Converter.
According to CamelCamelCamel, it's at the lowest price again. Though, the exchange rate makes it slightly costly. Still it's a decent price.
Looking at Staticice.com.au, the cheapest one available is $69 AUD.
Looking at eBay, AU $54.47 with shipping posted from USA.