There is an article on it in this months Classic & Sports Car so I guess they think that adds 10k to it especially as the article values them at around 10k for a good one.
decided to rebuild a 130 water pump at my friends work shop, seeing i had the bearing and the seal ,but found the impellor had a hairline crack. seems someone had tried to take it off in the wrong order,found it welded up on the under side! doh!! have another impellor on another pump