The Vampire Diaries S1 and 2 are also back at $19.99 (they were this price 2-3 weeks ago?)
Fringe dropped from $21.99 to $19.99
Same with The Big Bang Theory S3 and 4
Wish these shows on blu-ray were available and as cheap when I started buying Supernatural and Vampire Diaries sets on DVD (same goes for Fringe and Doctor Who) after each season.
It'd be weird not to finish them on the same format. At least I can pop them into portables without being tied to just the home blu-ray player.