HOUSTON -- Barry Sanders knows his trading cards are bought and sold every day.
When the Hall of Fame running back learned that a Houston couple desperate to have a baby was auctioning off one of his most rare cards to fund one last attempt at in vitro fertilization, he was stunned.
The former Detroit Lions star is helping spread the word about the sale of the card signed by both he and Walter Payton so Todd and Ula Nelkin can raise $20,000.
Sanders tells The Associated Press it would be "very, very special" if his card helped the Nelkins have a baby. Todd Nelkin says: "I would love to keep the card, but I would rather have a kid."