The Beckett Baseball Card Monthly #66 September 1990 focusing on Rickey Henderson of the Oakland Athletics is a sought-after publication for sports trading card enthusiasts. This magazine offers in-depth analysis, card values, and insights into the baseball card industry from September 1990, featuring the legendary player Henderson as the main subject. With the Beckett publisher known for its expertise and reliability in the sports trading card market, this issue is sure to be a valuable addition to any collector's library.