Although currently the monstrous 250 GB Hard Drive is only available through Special Edition bundles, that may soon change. Just recently, GameStop has listed a standalone hard drive for $129.99 which was set for release on March 23, 2010. While the listing is now gone, GameStop said rather cryptically that the listing “is not an error.”

Hit the link below, and be sure to watch Xbox 360 Digest for more information on this in the future.

[Via Joystiq]