His net worth was said to be $2 bil., so the $280 mil. he paid for the Dallas Mavericks was chump change!
The Dallas Mavericks and face of the franchise Dirk Nowitzki have finalized ... 
deal with another bump in pay that sets up the star forward to earn $50 million ... 
in each of the next two seasons, though he has said repeatedly that he will ... 
Dirk's done so much for this franchise, he's earned that opportunity.".