Amazon has some fun Halloween DVD's available to order or pre-order:
This one doesn't come out until 9/27, but you can pre-order Scared Shrekless & Monsters Vs Pumpkins Halloween for only $15.99. Ships free with Amazon Prime/Mom or a $25 or more purchase. That's only $8 per DVD. Amazon gives you their pre-order guarantee, if the price drops before your item is shipped - you get the lowest price.
You can also get The Penguins of Madegascar: I Was a Penguin Zombie DVD for $9.99. Ships free with Amazon Prime/Mom or a $25 or more purchase.