I've had a patron in a few times now asking about any movies (preferably documentaries) about ghosts and ghost hunting. I'm into them as well, so aside from the regular ones (like Ghost Hunters, Ghost Adventures etc) he was asking for, I had a few of my own suggestions.
Using both sets, and an Amazon search, I was able to scour our systems, looking for any and all movies about ghosts and ghost hunting. Unfortunately, by the third search, we were just getting repeats, which he wasn't interested in. I told him that I'd keep my eyes and ears open for any new ones we get in, but aside from further developing our Ghost Hunters collection (which always seem to be out), we don't have very many new ones.
Netflix, however, has at least a dozen different ghost shows. Ghost Lab, Ghost Adventures, Paranormal Files, Fact or Faked, Ghost Hunter International are just a few off the top of my head, but I've seen many, many more come across my suggestions screen.