The 1980s are synonymous with the junk wax era, a time when baseball cards were printed in enormous quantities. During this time, baseball cards were sold almost everywhere. Gas stations, 7-Elevens, Kmarts, and Toys “R” Us all sold massive amounts of product. Because of this overproduction, most cards from the decade (including Hall of Fame rookies) remain relatively affordable today. But adding an autograph completely changes the equation. A signature adds scarcity and a direct connection to the player that the non-auto card lacks. For many years, collectors viewed autographs as "damage" to a card, but the rise in popularity of modern "chase" autographed cards has helped transform the collector mindset towards signed older cards.   The 1987 Topps Tiffany Mark McGwire rookie card is already rare for a 1980s card, with just 3,733 total PSA-graded copies. However, PSA has graded only 83 autographed copies of the card.…