Each set of 9 "retails" for ~$150, since it's exclusive to FoodTV you aren't able to get them anywhere else (atleast that I've ever found). They have finally dropped the prices to ~$86-~$90/set plus there is a $15 coupon mentioned on the front page of the store.

http://store.foodnetwork.com/home.asp

Might want to check your local Target, mine has been selling FoodNetwork dvds for about a year now. I'm not sure if they have the Good Eats dvds though.