The 1981 Topps Billy Sims #100 trading card is a highly sought-after collectible featuring an autograph from the legendary football player himself. This rookie card from the National Football League (NFL) set is authenticated by Professional Sports Authenticator (PSA) and comes with a hard-signed autograph, making it a valuable addition to any sports trading card collection. With its standard size and association with the Detroit Lions, this card is a must-have for fans of Billy Sims and football memorabilia in general.