It was thought that Palace would accept around £60m for the England youth international, but Sky Sports claim he is now being valued at £50m.
They say the club ‘would not consider an offer of less than £50m,’ for the 21-year-old, who is ‘interested’ in the move but not ‘agitating’ for it.
United have already had one derisory offer rejected, as well as a second ‘substantial bid’.
But Sam Pilger, who counts Bleacher Report, FourFourTwo, The Athletic, The Times and the Mail on Sunday among his outlets, says United are ‘likely to return with an increased offer of around £50m’.
He adds that Wan-Bissaka ‘wants the move to happen’, while United are ‘determined’ to get their man.