Television broadcasting is all about visuals, but it turns out that the valuable part of WBIN-TV wasn’t anything that we could see. On Friday, Bill Binnie announced that he would be shutting down the state’s youngest television station because he had sold its broadcast spectrum – the right to send out its signals at certain wavelengths – to the Federal Communications Commission for $68 million, more than seven times the $9 million he paid for the station in 2011.