Sony MDR-XB400 headphones are marked down to $29.96 at Costco Docklands. Seemed to be about 4 colours in stock. Black, white, pink and purple.
Hardly Normal and JB are selling these for $69.95
http://www.harveynorman.com.au/sony-mdr-xb400-extra-bass-hea…
http://www.jbhifionline.com.au/ipod-mp3-portables/headphones…
Officeworks are selling them for $49.88
http://www.officeworks.com.au/retail/products/Technology/Aud…
They get favorable reviews on Amazon as well.
www.amazon.com/Sony-MDR-XB400-Series-Extra-Headphones/produc…
For $29.96 at Costco I don't think you can go wrong and with their returns policy it's a no brainer.
Can confirm they are at costco canberra, i got them when they were $39.99. use them for the comp, very good for the price