The cheapest price for Batman: Arkham City alone is around $54, so you are scoring the 2 blu-ray's (Batman Begins and The Dark Knight) for $7!
Also available for the PC for $42.
http://www.thehut.com/offers/batman.list
Can also get them as DVD's for a few bucks less.
The discount codes HUT2 and HUT1 would not work for me on these though…
Oh yeah - Batman: Arkham Asylum IS BACK IN STOCK!
http://dicksmith.com.au/product/YG5959/xbox360-batman-arkham…
Edit: Sold out again it seems?
what's the cheapest price if i wanted the game (Batman: Arkham City) only?