If he's an average player for the level you are on then it's better to get a replacement first and then sell him...Sometimes you might not find a player that you want but it's better to be a bit patient...Keep tabs on auction window and negotiations window,one or the other time you might be lucky enough to find an ideal player,if you are however in dire need of a new player then scouts is the only option left provided you're okay with spending 50 tokens on a player.