For years the Ken Griffey Jr. card to have has always been the 1989 Upper Deck #1 Rookie Card. Still right now on ebay that card still sells for between $25-50 ungraded, and near $100 graded high. But there are several alternatives to getting a cheaper Griffey Rookie Card. My personnel favorite is the 1989 Score Traded #100. You can find these on ebay for about $3-7 ungraded, and only $15 graded high. Some don't like the colors used on the traded set, but I kind of like the green, pink, and purple boarders.