$12256 / $11500
Full information is available here: http://gamedev.tutsplus.com/articles/news/enjoy-these-totally-free-space-based-shoot-em-up-sprites/
This mini sprite pack includes:
The files are in flat image format (GIF or PNG, with the animated files available in both sequential and sprite sheet form). PSDs are also included for everything except the boss.
Artwork created by Jacob Zinman-Jeanes for Gamedevtuts+.