First of all, GD was crazy for not accepting that domain.
It would be a great site for public television to have. Might increase their publicity and donations too. I am not sure how much money public television stations have to spend on domain names though...
I think it has very high potential. If I were you, I wouldn't settle for anything less than high xxx for it. I think it would be possible to squeeze out high x,xxx to low xx,xxx to the right end user.