I am currently in my third season of Top Eleven (won all 4 major trophies in prior season). I have players on my roster that I am not using now (and definitely won't in level 4). My question is when is best to sell them? Wait until the end of the season for them to be at their most "valuable" or is it better to hang onto them to keep my team level lower when I get promoted? (I think I read that somewhere?)

Any advice would be much appreciated. Thanks all!