The card with Bonner and Schneider is indeed worth something - it's his 1982 Topps rookie card. There are probably all sorts of cards of Ripken with a dark bat, but one is his '82 Topps Traded issue. It's not the true rookie, but is worth more because it was produced in lower numbers (it's #98T if you want to check).
If you want to do something other than hang onto the cards, you have a couple options. The first is to take it to a local dealer. Another would be to put it on ebay or a similar service. You could also send the card to a professional grading service; this costs a little moneys, but if your cards are truly mint, their values might increase exponentially. Not all cards that we consider to be mint after a quick naked eye glance actually turn out to be high grade, though, so grading isn't a sure thing.