thanks for the info - I hadn't thought about them having collector value. I don't know the pros/cons of whether it was loaded with Black Powder or not... is that good or bad? does that mean it's more corrosive and probably not good?
Also, to my original question: I've always had the thought process of grabbing a box of shells as I see them in the store, but I don't want to keep buying new rounds if ammo goes bad. I just don't want to have to worry about ammo shortages or any other issues that our wonderful government may come up with. So, does it go bad?