That's what happens when you offer greedy players huge wage to lure them into your team, most of them have turned into a liability for the team and it's now difficult to sell them cause of their high wage, it not like other clubs are not attracted to those players but most clubs can't risk paying them what they earn at Manchester United and it's totally understandable.
Well so far they managed to sign two, Cunha and Mbeumo that's a here we go according to Fabrizio but that's not enough for a club that claim they want to go back to glory days, they'll need a sharp attacker and a good keeper to replace Onana if they want to do better next season, if not they might still finish midtable.
I also understand that if Manchester United wants to sell some of their notable players now, they will not get a good price by selling those players but why are Manchester United keeping those who are not performing well for the club at such a high price. There is no reason to think that they will do well if they are given another season, those who have not performed well for Manchester United despite getting so many opportunities will only waste the club's money no matter how much the club gives them but will never be able to take the club to a better level.
I see some players at Manchester United who if the club releases them as free agents, it will still be a profit for the club, at least the club does not have to pay these players high salaries at the end of each season. I do not know what other plans Manchester United has, but it would be better for them to release some of the club's players and bring new players to the club.