I wouldn't even consider it because of the case back engravings and neither would most collectors.
As for the price, I don't know what the seller is thinking but it reminds me of another Ebay Constellation that has been doing the rounds on Ebay with a BIN of $5000 or so for about 5 years!! I don't have the link to hand but it is quite amusing to see, still the same listing with about 40 offers dating back to 2010
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