The 2007 SP Game Used Edition Authentic Rookies /999 Sean Williams Rookie RC trading card is a single card featuring the basketball player Sean Williams. Manufactured by Upper Deck, this card is part of the 2007-08 SP Game Used Edition set and is serial numbered. As a rookie card, it holds value for collectors interested in basketball memorabilia, specifically from the National Basketball Association (NBA) and National Collegiate Athletic Association (NCAA) leagues. With a limited print run of 999, this authentic rookie card of Sean Williams is a sought-after piece for fans of the sport.