Happened to someone I know where the transfer fee was just outside the transfer estimate range, so I intend to clarify things before I start listing players.
maybe he estimated the range in a wrong way, i believe the GM have experienced with the transfermarket and the usually prices ;)
And normally they are pretty cautious with fines, the last case i heard from was an 3,3k salary player who was selled for 600k, where he just got fines in the hight of 250k. And even with all equal skills, this player can't be that strong.