Hi Stacy,
No one else will ever notice the inside mark on the interior tag. If you can get it for a reasonable price, and you have always wanted the bag, I would go for it.
Eventually, many bags get scratched or nicked, and not looking so perfect, but we still love them, so a little black mark on the tag is really nothing.
You could easily get a new dustcover, and just as long as you know it's real, I would not worry about the card. Also, many bags have been bought on ebay with missing cards.