The first thing you'll notice is that the BGS 9.5 graded cards in the table warrant healthy and sometimes massive premiums to ungraded book value. For example, a BGS 9.5 1993 SP Derek Jeter RC carries ...
How come that Frank Thomas rookie card you stowed away in 1990 is now worth less than a Happy Meal? Chalk it up to the baseball card bubble of the late 1980s and early 1990s. In a new book, Mint ...