The cards are from an extremely rare series issued around 1910. Up to now, the few known to exist were in so-so condition at best, with faded images and worn edges. But the ones from the attic in the town of Defiance are nearly pristine, untouched for more than a century. The colors are vibrant, the borders crisp and white....The best of the bunch -- 37 cards -- are expected to bring a total of $500,000 when they are sold at auction in August during the National Sports Collectors Convention in Baltimore. There are about 700 cards in all that could be worth up to $3 million, experts say. They include such legends as Christy Mathewson and Connie Mack.