Old newspapers are usually valued on importance and condition. Condition determines price, also topic and city. A story about tler in German from a Berlin newspaper or a big front page story from the International Herald Tribune or the New York Times will usually fetch more than a United Press or Reuters story just run in a local newspaper in Erie, PA, or Birmingham, AL...eBay and other sites can give you some ideas, but the sad truth is in the age where many young people do not read, and newspapers are failing, old historic newspapers rarely bring more than a few dollars.Sorry.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.