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Was this car formerly owned by Franz von Holzhausen and/or his father? I used to work for Tesla and remember seeing a Model S in this color or a very similar color in the back yard at the Fremont factory before delivery. The rumor was that it was for Franz's father.
If this is the same car, that's a good background story and could easily increase the value to a collector or hardcore Tesla fan. If not, maybe it's 1 of 2 in this color.