I agree with JB; trading Danks would be a salary dump. We won't get a top-notch MLB-ready prospect (like Danks was when we acquired him for McCarthy) by trading Danks.
Salary dumps are only useful if the money goes to something else - preferably something better, but at least something equally good.
The Sox have proven that they approach payroll as a year-to-year proposition. Saving money in 2014 and 2015 does not "bank it" to spend in later years.
So, can the Sox improve their rotation in 2015 (and beyond) by dumping his salary this year? I doubt it.
The universe is the practical joke of the General at the expense of the Particular, quoth Frater Perdurabo, and laughed. The disciples nearest him wept, seeing the Universal Sorrow. Others laughed, seeing the Universal Joke. Others wept. Others laughed. Others wept because they couldn't see the Joke, and others laughed lest they should be thought not to see the Joke. But though FRATER laughed openly, he wept secretly; and really he neither laughed nor wept. Nor did he mean what he said.