I agree with you that it sounds too good to be true. The Kubrick hits some of the same marks, but overall it looks questionable to me. Here is a Malcolm I got in person 3 years ago and a Kubrick that is definitely authentic:
Thanks guys, certainly difficult to tell as the McDowell definitely looks right and 75% of the Kubrick looks right based on research. He says he got it at an estate sale but I have seen a few fakes which claim to be from estate sales so I don't know for sure but he seems adamant it's the real deal.