I have a feeling this may be a pricing error on EB Games. It's much cheaper than any other retailer including Amazon. JB sell it for $189 and Amazon do it for £108 and the sticker on the box says was $288 now $188 but I actually got it for $88.
I had to call around a bit to nail one - I can confirm VIC Chapel St and Victoria Gardens don't stock them. I bought mine in the Swanston St EB. If the staff have trouble finding it it's because it may be called the "Sennheiser Universal Headset" or alternatively ask them to check the sales list as it went on sale today. Both EB games I went to had a lot of trouble finding the name of it.
feel plastic but sound great