In other words, you really don't know if you're a psychopath or not, but you're going to sell the book claiming you're a psychopath anyway. After all, M.E did it, so you figure you can too.
Your book already lacks credibility with the knowledge that you haven't been formerly diagnosed.
What you could be selling is a misrepresentation of psychopathy if it turns out you're not one at all. That's how false information spreads.