Quoted from Jojo1111:According to this post:
https://groups.google.com/forum/?hl=en#!topic/rec.games.pinball/c8e1WtJ1MQQ
"...The William Wiley pinball machine: Pinball: Only One Earth (based on
Northstar) sold for $125K."
More info here:
https://worthly.com/most-expensive/the-most-expensive-pinball-machine-of-all-time/
And I've read (though not seen confirmation) that a Wizard pinball that the Who took on tour at some point and used in their stage shows was auctioned for a million dollars. Might have just been wishful thinking though lol.
The Who have never used a pinball machine in their stage show.