Ok ty for your fast responses. I am still wondering what happens to the progress after you sell him. Will it get just deleted or can the new owner continue/(pause) the progress of new position/SA.

Pro tip: never buy a 7 star goal keeper, spare those tokens on a 7 star Offensive player. Furthermore, Aml, Amc and Amr is more likely to score goals than a St. Talking from experience here.