I sent him a "man, it would be very dishonest to represent this as a Gus, although those who would buy a Gus will immediately know the difference. But, I'm pretty sure it's a helmstetter. If I may have it authenticated real, I'll pay 3 grand and pick it up. And pay you a 500 finders fee."
So, no response. Oh well. Not even a good rip off scheme!