On a whim I checked out a Big Lots store today which was next to the supermarket. It's not a store I would normally check out, but for some reason I did today. So I get in there and they have a big DVD sale right up front; DVDs for three and six dollars. I flip through the stuff and nestled in one of the piles is a King of Kong for $3!
So if you haven't picked up a copy yet, the price is right if you can find one!