Yeah, a lot of individual parts "say" just 31000 miles, but to me, it looks like someone spent a whole lot of time trying to achieve that.
Like @inline6 above, I've got a whole host of "Yeah, but then why does this look like this?" situations all over the car. He hit some of them, but I've got others as well. Things like:
Dented frame rails, control arms, and floors.
Impossibly shiny clean yellow paint marks gratuitously applied on rusted hardware that has had the original plating stripped off.
Many other hardware pieces where the original plating has been stripped off or painted over with silver paint.
Adjustment witness marks on things that just should never have needed to be adjusted like the door latches.
Smeared screw heads on things that should have never needed to come off a 31K mile car like the hood prop arm.
I see a well kept Z wearing a well done, but many year old repaint. I see a beautiful Z that I would love to own, but I do not see a survivor.