Why gets my player not sold at the transfer market?

[Tobsen Tobsens]

Hi

it has struck me the quite last season which I get on level 21 my players not sold.
I get the last season and also in this season my players who have a quality of 125
does not sell. All the same at which time or how low / high amounts to the transfer fee.
I get them simply not sold. The transfer market goes on level 21 only to max. 124 strengths.
I have tried to sell him already several times.