I saw an item (250119359325) on a popular auction site that will remain nameless, but I was not really sure what to make of the fact that the calculator has two keys reversed. It's indicated that it doesn't appear to have been opened, and from my personal experience with 41s, I can believe it. I mangled my original 41C getting it apart.
Has anyone seen a mistake like that before, or is it a sure sign it's been opened? Just curious.