Kone seems to be a bit content after getting paid. We'd have to go into the 30-40M or 20M + players. Moyes would totally fleece us if he agrees to sell. Which might not be the wisest move given that CB is a position that you can find pretty cheap (case in point: Kone). Also recent big money buys for CBs haven't turned out well. The only one who has been really good the past couple of years to my knowledge was David Luiz who lets face it can do all the stupid stuff he wants because they play so defensive.
Given that there is no money at Sunderland to spend, Moyes isn't going to sell anyone in Jan. If management goes over his head he'll walk too. I also doubt Big Sam would come back if players are sold.