Interesting question Denzil, there are a couple of different ways to look at this. If he was from NZ they would be asking $150k-$200k. From an Australian viewpoint they would have to be asking $100-$150k.
No doubting his class and ability however I would be very wary about buying him, for a number of reasons:
Firstly I think I remember that he had bone chips removed from his knees last year? slight worry.
He has had a lot of gutbusters, especially as a 2yo, what toll have they taken on him?
Why hasn't he won a major? Unlucky or is he a flat track bully that dominates the heats but doesn't deliver in the final?
Puppet is a good trainer, don't think there is a lot of improvement left in him.
Like Skyvalley in last years 4yo crop, who will be the big improver in this years 4yo crop if not DUM. Letmethru or the Hei horse?
On the flip side he is a Muscles Yankee colt, so if he put away a couple of majors he could have a stud career.
Just my opinion if you are buying him good luck.