If we are going to sell then January likely gives us the highest value, but replacements will be at a premium.
If we wait till the summer his value will be lower but we benefit from having him on the pitch (aside from injuries).
I think that if he were willing to sign a 5 year contract then we should keep him as hes a top class centre back when on the pitch. At the level were currently at, he'd be our Ledley King.
However, if he hasnt signed by 1st January then i think we need to offload him. Anything like £20mil or more and we should sell.
Make an immediate pre-contract offer on 1st Jan for Matthias Ginter, or perhaps Niklas Sule.
Otherwise, just take the money...stick with Godfrey/Branthwaite till end of the season if were able to also offload one of Keane/Holgate.