Pretty damn cheap if you ask me considering it comes with a real electric guitar by a reputable brand. Click on the '9 new' link and click on the Amazon listing to get the cheapest price, and select expedited shipping at checkout. It's currently sold out so there's a wait of 2-3 weeks. The guitar itself looks to be worth ~$215: http://www.ebay.com.au/sch/Instruments-/166070/i.html?_nkw=e…
There is currently no Australian release date for this game and it's scheduled for release in Europe sometime in 2012, so there may be a long wait to get it locally. I believe the game is region free for both consoles, but please check to make sure.
EDIT: It appears that the Xbox version is region locked, so only buy it if you have a hacked console.
EDIT: I've just received an email from Amazon that stock will be arriving on October 25 (at least for my order).
Despite the exchange rate being 1 AUD = 1.0336 USD, Amazon is exchanging it at 1 USD = 1.0103655461 AUD, making the total cost for me $218.21.
Looks good but I'll do a little more research before I deicide to spend that on a game (yes I know it's a real guitar which is why I'm contimplating it in the first place).
Seems like a non-guilty way to play games; yes I'm wasting time on games, but I'm also learning the guitar which seems a lot better way to spend my time. :)