-We bought him for 13 million
-He's on reasonable wages
-He was decent whenever he played
-Can play the inverted full-back role on both sides of the pitch
-Seems to have a very good mental profile too
But yeah let's get rid of him, in typical whining RedCafe fashion
He's a good player that we can turn into a 40m full-back and/or he can be a great servant for the club for many years, if he can come back from this injury, and it remains to be seen whether that's the case or not. People wanting him sold are just frustrated and don't know much about squad building.
And who would even buy him right now? We'll just bin a potentially very good PL fullback for 5 million (if we could even get 5m) because some posters on RedCafe are angry...not to mention that it would be a shitty thing to do. Help him with his rehabilitation and help him restart his career ideally at United, or somewhere else if it has to come to that. I don't want us to be assholes with players who don't deserve it, it's a classless thing to do.
Leave that behavior to the likes of Chelsea who have just banished Chalobah and Gallagher from their squad because selling them will let the club spend a lot of money on 17 year old Brazilians. Two players who have been with the club almost their whole life, 2007 and 2008 respectively.