Cadena SER says United's offer is 60 million euros plus 20 million in bonuses, which has been warmly received by Barcelona.
Barcelona know they can get a good deal for a player that originally cost them 75 million. United's offer would allow them to rid themselves De Jong's remaining 40 million in wages, while allowing them to make a profit of about 50 million.
That figure would help them reduce the losses from last season, though Barca are confident they can get an even bigger fee from United.
The stumbling block is the player, who for the moment is reluctant to leave the Nou Camp this summer.