Answer by  
                                                                                          destinyisntfree (242)
                                                            
                          
                          
                                                          The value of a sports card is going to vary significantly.  While it is generally believed that a card autographed by the player will be more valuable than one that is not signed, how much of a difference this will make will depend on who the player is, whether they are still alive, and various other factors.