Alien Colonial Marines Xbox 360/PS3 $24.70 from Zavvi. Shipped.
You need to use the Zavvi promo code to drop the list price of £34.75 to £14.99. Shipping to Australia is 99p. Converted this brings the price for Alien Colonial Marines Xbox 360 and PS3 to around about $24.70. Thats a bargain.
You will need to use the promo code XBOXREVEAL2 on the Xbox version and XBOXREVEAL3 on the PS3.