Consider Mike for this.
I want a term that describes Mike, who is very easily 'convinceable'. But, Mike is not foolish or innocent. In other words, anybody able to fog a mirror can go, convince, and fulfill their wish.
Simplest example is...a salesperson with a bogus product going to Mike; it's easy for him to convince Mike. Mike purchases product without any hassle or a contractor going to Mike, convincing him for a fraudulent scheme project without much efforts.
What do we call Mike? A word for a person who can be convinced easily; but please mind it, he's not foolish or innocent. He's just easily convinceable.
My homework: I tried OneLook Reverse but could not get the term :(