Attend baseball games for fun and profit

Do you have time on your hands, a love of sports and a need for cash? Perhaps you should take yourself out to the old ball game. According to the Wall Street Journal (subscription required), ball hawks have made some good money catching the home run balls of Major League baseball players and selling them back to the player or putting them on the open market. Steroid Mark McGwire's 70th home run ball, for example, brought in a cool $3 million at auction in 1998.

Of course, not every ball will be worth a fortune. I doubt Steroid Alex Rodriguez was interested in paying for the ball from his 328th home run. But when and if he hits number 763 (breaking the record held by Steroid Barry Bonds)? He might well be willing to pay millions (in A-Rod currency, that's about a dollar) to obtain that ball for his trophy case. And even that lowly 328th homer ball will have value on the collectibles market.