2 Billion bucks for the Clippers is absurd...but it's not much to him. When you are Steve Ballmer, a sports franchise is the ultimate toy. And a sports franchise in LA means something to him. He could wait around forever and try to buy the Lakers...and die...or he can go big or go home.
For those of us who are avid Cougar fans and are fortunate enough to have the means to do so, an event like that would be a memory we would carry to our grave. It has real value. Were I struggling to feed my family, I'd be a fool. With the means I have, it's an entertainment choice.
Sometimes things really are relative...