In lower leaugues its never a good idea to hang on to want away plyers as they do effect team morale if still selected. Especially if there mental stats are high.
I've got a defensive midfielder I bought for £100,000 who's value is now £600,000 and wants to move to a bigger club. Request granted go on push off. I've put him in the reserves and moved a CH in his postition who's more effective than him. On a unbeaten run of 11 games since consigbnining him to the reserves and will accept all offers in January