My brother-in-law just bought a used Model 41 that is in good condition with the exception of the slide. While it is not bad, it does have some blue rubbed off. He wants to just buy a new slide. I told him it is used, use it. He only paid $375 for it so he's into it right and my feelings are that a new slide won't increase it's value enough to make the purchase worthwhile. Any thoughts on it?