They aren't being bought for what they used to although you can find them for sale for very high prices but they stay just that, For Sale. Most of the rifles that are shooters have had butt pad's/stocks/sights/checkering, etc. replaced or redone down the line and already show wear that would substantially affect the value from a knowledgeable buyer.
Personally, I like my rifles that have character. Every nick and mark means something. Likely, though, you aren't going to hurt the value much if you redo it to your liking unless you still believe it is a $1,200 rifle.