Don't assume any particular radio station in 2013 is raking in the cash like they did 5 or 10 years ago. The entire advertising industry in undergoing monumental changes and upheaval (primarily due to the explosive growth of the internet), and thus radio, tv stations, what's left of newspapers, outdoor, etc....are affected.
Traditional media may still run a lot of ads/commercials...but, rest assured: they aren't getting the rates they did just a few years ago.
Something else to remember...the big advertising bucks go to stations who's audience is heavily adults age 25-54....leaning female. Talk radio in most markets leans male, but most-importantly age 50+.
In the case of whether WNIR might sell...who knows. But, the advertising and media advertising landscape has really changed in the past few years. It's got to be an option many owners might consider today....an option they'd of never seriously thought about even 5 years ago.