There are 3 versions of AstroBoy. Astro 1963 box set 1 has been released by Right Stuf International on DVD at $130 SRP (52 episodes, B&W).
Astro 1980 (color) has been released by "MANGA" at $40 SRP (51 episodes; episodes 1 &2 of the Japanese broadcast were combined into episode 1 of the US broadcast; the other 50 episodes are sub and dub.)
Astro 2003 has been released dub only by Columbia, 50 episodes for $50 SRP. Actual market price might be 60% of SRP, so $30 for a complete set is about right unless you want the restored 1963 version.
-Galen