It's things like this that make me so happy our house has all original windows when we bought it in 2009. I'm sure nearly every other potential buyer would have pulled and replaced them. They do look pretty bad. But I have 9 restored now, with 8 to go, and they couldn't be finer. Happy owner, lucky house.
People likely won't understand, no matter what you say. In the USA there is little reverence for things old, unlike in Europe. Just the other day a customer of mine was asking what I'm doing to the house right now. I told her about the windows, and she looked puzzled, perhaps because of what sounded like a lot of work to her. She said, "Why are you restoring the windows, is there something special about them?"
Well, not really, they aren't made of gold but it was pretty clear she just didn't "get it".