It's certainly a good looking crank, but looks to have had attention to the sludge trap plug which has been a bit butchered and replaced slightly below the cheek face, on the timing side this risks obstructing the oilway to the big ends.
There is nothing particularly unusual or rare about this crank, at least in the UK. Sure, you can't pick one of the dealer's shelf as easily as 50 years ago, but they are still around.
As to value, it's worth what someone is prepared to pay, and like Musky I hope that is a Typo.... Anyone had a crank grind lately? A crank good enough ready to use can be a money saver. Shame one pin is slightly out of round, but probably OK for light use, compared to the difference a full regrind might make, the benefit of such in this case is probably marginal.
Swarfy.