Ajax are offering £19million plus-add-ons for Rangers defender Calvin Bassey while Brighton are understood to have proposed £16m for the Nigeria international.
Sportsmail understands both clubs have already made approaches but are yet to put forward offers that would be deemed acceptable.
Bassey has been lined up by Ajax to replace Lisandro Martinez who is joining Manchester united for £46m.
Rangers are keen to retain Bassey in the wake of his excellent breakout season and have placed a £25million price tag on the player.