There is a bot now buying your players, not only selling them in the regular market... so it needs some days if you set the highest price... at the end of the season I use the -Sell Now- button in many players because despite that it just gives the 60% of the player market value or something similar, is the fastest way to get rid of them, and lower the AvQ.
The cash isn't a problem once one reach certain level and too by playing few friendlies you can have a good economical balance.