We wouldn’t be able to get a player like him at his stage, so I would keep CoH and spend some of the Gus money on the next one with a few years of development needed to replace him. Then spend a decent amount on that Gus replacement we still need.
We wouldn’t get much money for him in Jan considering he can go for a free in summer, so keeping him till the end of the season will give us the best chance of a push for the playoffs