Fanatical offers Steam downloads of Warhammer: Vermintide 2 for Windows for $23.39. That's the lowest price we could find by $7.

Also available is the Collector's Edition for $35.09. That's the lowest price we could find by $10.

Update: Coupon code "SUPER6" cuts the Standard Edition to $22.55, and the Collector's Edition to $33.83.