Unaired Pilots of TV shows are rarely released on DVD. I can only think of 3 examples:
The Cage, which is included as the last episode on the Star Trek TOS Season 3 DVD set.
The Lost I Love Lucy Pilot, which is included as the first episode on the I Love Lucy Season 1 DVD set.
Unaired Pilot: The Tim Kring Cut, which is included in the bonus features on Disc 1 of the Heroes Season 1 DVD set.
Does anyone know of any other examples? Does anyone think other unaired pilots like the Buffy pilot and the Charmed pilot should be released on DVD?