€40 Million offer by Chelsea is good enough, it's crazy if Manchester United really want to sell him for €80 Million because they don't want to lose their money. It's better for Manchester United to release Maguire to join Chelsea before Pochettino change his mind.
This could be good for Maguire too, maybe he just not comfortable playing in Manchester United, if he can play very well in other team, this would be very interesting.
Harry Maguire has made his best contribution at Manchester United since August 2019 by ending this year at a cheap price, so this will be an opportunity for Chelsea as they try to buy one of the best players from Manchester City. However, what must be considered for Chelsea is that Harry Maguire is already 30 years old, which means he is old, and Chelsea are trying to make an offer of $40 million. Erik Ten Hag made a pretty brave decision because he had to let go of Harry Maguire for half the price of when Manchester City bought him at the start of his career at Manchester City.