Amazon.ca offers Deadwood: The Complete Series on DVD for $44.90 (C$ 49.99). With $8.96 (C$9.98) for shipping, that's the lowest total price we could find by $35. It includes all 36 episodes on 19 discs, along with bonus features.
There's a less expensive way, and then there's the way that works for you. The two may not be the same.