Starting at $37 (Wii) Amazon has the Eidos Tomb Raider: Underworld for $37 + free shipping = $37 shipped!
Xbox 360 version: $57 shipped
PS3 version: $57 shipped
PC version: $40 shipped
Tomb Raider: Underworld by Eidos resumes where Tomb Raider: Legend left off. This installment introduces a new, interactive playing environment that gives players a chance to immerse themselves more fully into the game. Players once again take the role of Lara Croft as she explores such wide-ranging places as the Arctic, Mexico, and beneath the Mediterranean Sea.