We're big fans of the King of Horror here at PDFU, while I don't believe any of his stuff is actual public domain. There are some movies that fall under Fair Use or even may be Orphan Works. Of course, King would still own the copyright to the Original Story or Novel. Anyway, we found a few that qualify for the site and may do all of his works eventually just because there are so damn many of them. It will be fun. Join us.
Dollar Babie$ we've found so far: