What is it worth to win in F1?

Apparently, as much as $45 million. That's the largest price that Jenson Button has been rumored to pay to get out of his contractual commitment to drive for WilliamsF1 starting in 2006.
Button is buying out his contract because he feels his championship-winning prospects are better if he remains with BAR-Honda. No doubt the $88 million, five-year deal promised by BAR-Honda didn't hurt, either.