Upper Deck
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Upper Deck is the second best producer of baseball cards in the world. Upper Deck (UD) is responsible for many breakthroughs in cards. Things like chrome cards, autographs, and jersey\bat cards. Now, they even have a card with a piece of helmet in them. Above are some cards that show many different kinds, and brands of cards. The old Willie Mays is from 1945, and is worth about $2,000. The Mike Piazza autograph is also very valuable. UD is still striving and will still be making cards for generations.