That sounds to me like they are looking at low-tax or no-tax options, not outright sales. Because all the stations were acquired at low or no cost, the capital gains taxes would reduce the proceeds significantly, while a merger preserves all or nearly all the capital.
The thing that will probably hurt Cox the most in doing this is that they are a multi-platform media company that is mainly based in OLD MEDIA. Namely, print, radio, and local TV affiliates. The kinds of companies that are looking for this kind of deal and expansion aren't at all interested in newspapers or radio. They're moderately interested in local TV stations. But even Sinclair is looking to create some kind of national footprint that Cox simply doesn't have. So what Cox brings to the table is a lot of horse & buggy technology while the rest of the industry is in another galaxy.