I have a William Lewis and Sons number 236. Brand new this instrument lists for $8k - 13k. Right now it is in need of repair. Once the repairs are done, how much would this instrument be worth? It was bought by a relative around 1960 or so. I have a friend who says that it could be worth $20k after repairs. I think they are dreaming. I believe more around $8k -12k tops. This is due to the fact that the builder and age are unknown at this point, and I have seen known age and builders going for $8k -$20k. Who is closer, or is this another 'well it depends on several factors' type of thing? Thanks.