If Greyhawk was put up on the auction block, I have a feeling that Erik Mona would ransack that place like the Mongol Horde under Genghis Khan and win the day.
Seriously, it is quite evident that himself and a lot of people associated with Paizo are fans of the setting and unless some big name, backed with big money, or a richer than all get out fan came in, I doubt anyone else would be able to get that license or property out of Mona's hands, unless the man was dead.
*chuckles*
Plus, I doubt it should go anywhere else, first, as I've a feeling that if he had control of Greyhawk, we'd be in for an awesomeness that is on par with the current level of product that is coming out of Paizo.
And that is a nice level of awesome to be at. *grins*