15500 Blue listed for $123k

[cascavel]

I don't understand why there is a $40K premium for the blue dial. It's not like the old days when you could buy the black or white dial from your AD but only get the blue dial at the AP Boutique. Today you can't get any 15500 anywhere but the boutique, they're all boutique specials. And there's a plethora of blue dial watches available today including the 15202, only made with a blue dial and the PP5711/1a which was mostly made with a blue dial.
It seems like the dial color of choice for the 15500 should be black.