It's real in the sense that it used to be a living thing and was shrunken and prepared by the Jivaro tribe of South America, but it's not human, just an "authentic replica." I do own it though, I tied it to my blowgun case.
I have a couple mammal skulls but mine are dry bones. Elk and coyote. I'm hoping to use them for Jumping Spider habitat if I can convince my wife to let me keep spiders in the house. We already have several Brown Recluse inside but thats not a species I want to encourage.
I haven't been lucky enough to find an intact skull yet, but I've found a few various bones around the desert that I wanted to use for a snake habitat. I've already convinced my fiancee, now I just need to find the snake. I'll trade you a black widow for a recluse lol