Batman: Arkham City for PlayStation 3 or Xbox 360 $29.99 Shipped
Batman: Arkham City for PlayStation 3 or Xbox 360 for $29.99 shipped. Here is a screenshot, along with a review of the game for your reference. Most places have this game for both PlayStation 3 or Xbox 360 for about $49.
3 very similar deals were also reported by some other sources: