Generally, changed parts (pots, hardware, etc.) affect the price negatively from a collectible standpoint, as "all original" is considered most collectible.
Oddly enough, it doesn't matter if the changed parts actually make the guitar a better player.
Worn backs, etc. also generally negatively affect value, unless it is a modern relic, then it increases value.
That is where the term "player" comes from when referencing used guitars. Changed parts or excess wear.
If those things don't matter to you, it helps to get a better price on a very nice guitar.