That depends what his motivations are. If he’s happy to pick up a decent wage but not play, he will be hard to sell.
If he wants first team football and is willing to reduce his wages then it’ll be easier.
If we were looking to sell him, we’d be looking, at a minimum, of recouping what we paid for him, and probably more. So that would be the biggest sticking point.
In any case, it’s probably too early to think about his future. But if he isn’t playing by the end of the season then I can’t imagine him wanting to stick around as a number 2.