I think the question is - are you buying it for resale/collectors value or because it is shiny?
Resale/Collectors value is almost nothing after you do after-market alterations on a watch. Even cleaning or painting the dial will destroy the value. Heck, with some Rolexes - sending it in to Rolex will destroy the value (they will replace the luminous hands from the 60s with modern ones)
But if it makes you happy, the price is right, and you have a watchmaker you trust - go for it.