Want to go see Mark McGwire play at Busch Stadium this year and possibly get a valuable autograph? Well, unless you've already got a ticket, the chances for collectors to get an up close look at small. The Cardinals report they have already sold 2.5 million tickets this year for home games, leaving a precious few single game seats available. And, if you wanted to see McGwire face Sammy Sosa and the Cubs, well, forget it. All Cubs-Cards games at St. Louis are already sold out.