GameStop offers Steam downloads of The Typing of the Dead: Overkill for Windows for $3.39. That's $2 below our January mention and the lowest total price we've seen for this game. (It's also a current low by $3.)
Of note, Green Man Gaming offers Steam downloads of Typing of the Dead Complete Collection for Windows for $8.42 via coupon code "SPOOKY-TREATS-GMG20X". That's the lowest total price we could find by $16. It includes the game base and five DLC packs: Shakespeare, Filth of the Dead, Love at First Bite, Dancing With the Dead, and Silver Screen.