Pricing a guitar for sale question

[ewalling]

Originally Posted by The Bard Rocks

On a very expensive guitar, to many people the p/u may well be a subtraction from its value instead of an addition, as it means it is no longer "original".

This would be my reaction, I'm afraid. A guitar that did not originally have a pickup but has had one added has been tampered with rather than improved, in my estimations.