Best Worst Horror Movies?

I love horror movies, specifically older ones that tend to be in the b-movie (get it?) category. I've seen a lot of movies that fall under those guidelines and would like to find more. Does anyone know of a good horror movie that relates to the things I stated above?

BTW, if you're looking for a horror b-movie watch 100 Tears. It's newer, but it's great. The special effects are amazing, (which is why it happens to be NC-17), and the film doesn't take itself too seriously.