According to Boston.com:

"While the Sox have spoken with the Chicago White Sox about the availability of lefthander Mark Buehrle -- special assignment scout Allard Baird has been in Chicago and watched Buehrle pitch -- they are not close to making a deal, according to team sources. The Sox have no interest in parting with prospects such as outfielder Jacoby Ellsbury and pitcher Clay Buchholz, the types of prospects White Sox GM Kenny Williams almost certainly would seek in return."

Hey if the Red Sox don't want to part with prospects, then the hell with them. Trade Buehrle to the Yankees or some one else that will part with prospects. If not, keep Buerhle and re-sign him. Let's see how happy BoSox fans will be with Kason Gabbard in the rotation or worst, Buerhle as a Yankee!!