I think the idea of selling one's soul is stupid. Why would you give yourself over to slavery? Of course, Satan would have none of that! He's all about freedom. I also believe, firmly, that NO ONE ELSE can sell your soul. No matter who says it - be they a church official, rabbi, imam or whoever - they are liars. You, and only you, are the owner of your soul/self.
That said, I find it sad that people believe that others have such power over them...may any Gentile who let them be sold this bill of goods realize the truth, and so get free.