She isn't trying to get rich or anything. I am sure that there are plenty copies out there.
They have been stored in a cool dark place all these years. Because of that, they are really well preserved. She asked me what she should do with them, but I really didn't know. Framing the front page of a few would be cool, but I assume the light would ruin them over time. Are there any museums or historical societies looking for these? If that were the case she would probably be up for donating some.
If any of you have ideas, let me know. I am happy to pass them along.
As you intuited, lots and lots of people saved newspapers from big days, and archives decidedly do not want them. All national newspapers are fully preserved, usually digitally. (If your grandma finds a large run of a small local paper in her basement though, give your local historical society a call, those can be often helpful if we have gaps.) So they are only worth sentimental (...okay that word is awkward for the murder of the president) value, she should do whatever she thinks interesting with them. :)