Yeah, I've seen sites like that. No links will be given out to this one, but I once saw a site where you could buy an armless, legless, nearly-faceless person that is basically a piece of fuck meat. The prices (when converted from Bitcoins to USD) were ~$100,000.
Oh, and there's also a place where you can hire hitmen. It's got a lot of trolls on it since it became more well known, but back in the day when it wasn't as well known as it is now, it was full to bursting with offers made by people who genuinely wanted people they knew dead.
Edited:
someone showed me a site that was about "human experiments", basically the logs from some guy torturing people he kidnapped
I still maintain it was total bogus
the serial killer forum was lovely though
Oh yes that was lovely. That one's full of trolls now too though. If anybody wants to find it (again, no links) the name of the forum is Violent Desires.