That's one of the points, yes, but the black market doesn't dictate the value of the exploit to Google.
A hardline bargaining position with Google would be more like "pay me what I want, or else I'll give it to all takers on the black market for maximum damage". That would be unethical and probably illegal to boot but it's a better definition of value than "1$ greater than max bid".
A hardline bargaining position with Google would be more like "pay me what I want, or else I'll give it to all takers on the black market for maximum damage". That would be unethical and probably illegal to boot but it's a better definition of value than "1$ greater than max bid".