Apple iTunes has Overlord Anime TV Show (Digital HD) on sale below. Note must purchase through the iTunes platform.
Overlord (Digital HD Anime TV Show)
Overlord (Original Japanese) (Digital HD Anime TV Show)
Overlord II (Digital HD Anime TV Show)
Overlord II (Original Japanese) (Digital HD Anime TV Show)
Overlord III (Digital HD Anime TV Show)
Overlord III (Original Japanese) (Digital HD Anime TV Show)
$4.99 Each