if it took 80+ years for the rust to get that way, it certainly won't worsen (unless one is using poor storage conditions) over the course of the owner owning it for the rest of their life. That said, unlike vintage cars or bikes, where performance and clean metal is ideal for showmanship, some people don't mind a little rusty gold parts on their vintage comics. I'm not saying buying comics with rusty staples is ideal, but a little rust on the outside of the staple isn't a deal breaker on rare gold. When the rust migrates to the prongs (@ CF) and interior paper, that could pose a larger issue for any owner.