I think that putting tickets in too much prices will not make you gain so much ... so put it in moderate level so you can gain money and also gain possession and hoping to win the match.

Secondly : If you want to gain money you can sell the higher prices players who didn't make the difference.
Thirdly : If you are out from cup and also from champions league so there is no need to keep great players if you will not compete to win the league title.

all of this will give you money and your balance will be positive .