Today’s Video-On-Demand purchase deal today is The Dark Knight for only $4.99. This is not a rental, but a purchase – a great deal for this movie! Purchases through Video-On-Demand let you download the movie to your Tivo or Windows PC, as well as any two portable devices. Plus, you can use any Amazon Swagbucks gift certificates you have! This deal is only available today, so don’t wait too long!