'Sacrificing' Demiral is a terrible idea, even if you hate the guy for a healthy reason. He will either fully recover or go out of the backdoor, after such an injury. The team with most knowledge about all this is supposed to be the seller in this great deal?
Whoever we approach would be either trying to insert a shitty clause (20+ games before the sale kicks in) or rape us on the price. That is if they want to take the risk at all - and most of the teams that currently can afford to buy him are not going to risk 1 non-eu, non-hg member of their squad.
In short, even if we were to sell Demiral for any reason it will be minimum after the next season. Romero or not. In fact - BonBon would be departing sooner imho.
PS: And that is before you find the real message we would be sending to current and future recruits: "Come here, try to impress, get injured and shipped out of the backdoor before noon...'