I recently received 1000’s of baseball cards ranging from the 80’s to modern stuff due to the passing of my father-in-law. While my wife and I were going through some of the cards with close friends we found a card that had 3/5 on it from a more modern set and one of our family friends said it was rare and that’s why it was in a sleeve. Can someone help explain what the card is, if it’s worth anything/what to do with it?