Amazon has the Kung Fu Panda Three-Disc DVD Boxed Set (Kung Fu Panda / Kung Fu Panda 2 / Secrets of the Masters) available for pre-order, $24.99. Shipping is free with Amazon Prime. The release date is 12/13/11.
In addition, you’ll receive a promotional credit to rent the first Kung Fu Panda movie at Amazon Instant Video.
Note: This is an Amazon deal. The price may change quickly.