SCP Auctions' online sale of Barry Bonds' 762nd HR baseball begins March 31. As of now, this ball represents the final home run hit by Bonds and, as a result, it also represents the all-time home run record that the game's best players will be chasing for the an undetermined number of years to come.

SCP Auctions also sold the ball hit by Bonds for his 756th career home run for more than $752,000, which was the home run that broke Hank Aaron's all-time record. As valuable as that was, most memorabilia experts believe that the baseball that would eventually represent Bonds' final home run would be the most valuable – perhaps worth as much as $1 million.

So that makes this upcoming auction so interesting. The baseball has the potential to be a $1 million item, but is it worth that much right now? Bonds has yet to sign with a team for 2008, and doesn't appear to have a lot of offers pending. There's a very good chance he has played his last game.

But it's not a guarantee. Bonds hasn't officially retired, and if his legal issues are resolved and a team is looking to add some power to its lineup as the playoff push begins, is it out of the realm of possibility that Bonds wouldn't be offered the chance to play again? Certainly not. If he returns and hits even one more home run, the significance and value of No. 762 is drastically diminished.

It's very likely that the 762nd home run ball will sell for a handsome sum. But the "what-if" factor could prevent it from reaching its full value potential.