Wladimir Klitschko's 1996 gold medal
Selling price: $1 million
For much of the past decade, Wladimir Klitschko and his brother, Vitali, have been cleaning out boxing's heavyweight division and making every contender short of Lennox Lewis look like a sack of potatoes with legs.
There's only one thing that matters more to the Klitschko brothers than their craft, and that's the future of their native Ukraine. Vitali put down the boxing gloves to pursue a political career back home, where the streets of the capital city of Kiev have been marred by violent protests of the sitting government.
Wladimir, meanwhile, decided to sell off the gold medal he won in Atlanta -- Ukraine's first games as an independent nation -- to fund the Klitschko Brothers Foundation he and his brothers established to give young Ukranian children an education and provide them some exposure to sports.
"If they have knowledge they can succeed with that in their adult life and sport gives them the rules -- how to respect your opponent, how to respect the rules," Wladimir told CNN two years ago. "It is always in life like that, you go down but you have to get up, and sport gives you this great lesson."