iTunes Movie Sale!
For a few days more, as part of their Action & Adventure Movies sale, you can download the Dawn of the Dead (2004) Theatrical Cut or the Unrated Director's Cut for just $4.99 from iTunes.
Separate from that sale, the 2008 version of Day of the Dead, directed by Steve Miner and starring Mena Suvari, Nick Cannon and Annalynne McCord is also available at a discount for $5.99.
Download links here: