Cheaper than most places when you use code: WATCH25 for 25% off $63.99 to $48 USD. Not sure of expiry as I only found this one through a google ad. Pretty sure I saw another code that expired last week, but they have decided to run it again. And fyi, the referral system for green man gaming now goes through a third party provider, so even the referral link does not work.
Update: Price is in USD, despite having AU in title. Apologies for the confusion.
Update 2: Cheaper at Kinguin, using code TOP7COM for $55.90 in total. They have another option that comes to $50.59 but does not mention the Chaos Warriors DLC.
Nice price. I'm still apprehensive about pre ordering after getting burned by Rome 2 tho =[[[.