As one of its daily deals, Best Buy offers the Starcraft II: Heart of the Swarm Collector's Edition for Windows for $37.99 with free shipping. That's $2 under our mention from two weeks ago and the lowest total price we've seen for this edition. (It's a current low by $25.) It includes a hardcover art book, mouse pad, and soundtrack CD. Deal ends today.
Note that this requires a copy of Starcraft II: Wings of Liberty to play.