I've seen a few:
3. Impulse (1974) - that was okay. Very forgettable, judging by the fact I had to go to IMDb for a plot synopsis just to remember it
5. Doom Asylum (1987) - been meaning to see this forever. Sounds fun and it's such a cool title.
12. Virgins from Hell (1987) - this was fun and screwy as could be.
14. Las Vegas Bloodbath (1989) - I'm pretty sure I've got this on some multi-movie set but haven't watched it yet.
19. The Last Slumber Party (1988) - I think I may have seen this.
20. Offerings (1989) - kind of a minor favorite of mine.
42. Atomic Rulers of the World (1965) - I'm pretty sure I've seen this.
51. Camp Fear (1991) - this was nutty and pretty fun.
59. Amok Train: Beyond the Door III (1989) - really enjoyed this. That model train driving through ponds and stuff was awesome