The majority of players in BB are experiencing super depreciation, inside players to an extent aren't even worth the effort to train in some cases. The supply has been increasing, dropping the value considerably. There is only one group of players whose value holds constant. And that one group of players are those who have what the majority don't. Uber skillsets with incredible secondaries. I've watched some transfers involving the cream of the crop BB players and their value still far exceeds their estimated value.
If you player ain't special, expect a low transfer fee.