They have to give big discounts in order to recoup some money from the markets. Their position in the league, and result in europa league make other clubs reluctant to accept their very high offers for all of their flop players. This is something that is hard to face.
I noticed that of recent United now hire managers with big egos, but average at their job, first it was Ten Hag and his big ego, falling out with Ronaldo and then Sancho, as a result the club lost both players, albeit Sancho is on loan.
Next is Amorim, big ego, average at best, fell out with Rashford and now Garnacho, Rashford left on loan and Garnacho is expected to leave this summer. I think they should hire a manager who is less concerned with his ego, but more about his job, lol, maybe then they would stop losing their players for cheap and actually develop them into the stars that they ought to be.