Vincent Price plays Vincent Price in this film where a guy throws a murder party in a haunted house where the survivors get a big stack of money the next morning and is then surprised when the bodies start piling up. There's a bad script, dodgy acting, awful actresses who were clearly hired for their screaming ability, and you can see all the strings. However, there's Vincent Price, some kinky subtext, a vat of acid, little coffins containing guns, a head in a box, skeleton marionettes, and in one particularly effective scene, a witch on wheels. Entertainingly crappy in that way that only William Castle can pull off. Here's a trailer:
I watched it on Netflix Instant Streaming. I've seen it multiple times, and I get something new out of each viewing.