That is a frickin' steal! That's at least $20 off of each season, sometimes more. I picked up all three Deadwood seasons today. They're regularly $59.99. I got season 2 of Rome for Christmas, but I would have definitely snagged that, too. Rome and Deadwood are fantastic. Highly recommended.
Tomorrow I'm going to try another Best Buy and hopefully find the John Adams series they did this year. That usually runs $54.99. So it'll be like $27. You can't beat that.