Well, you could just reject all and you can assign your skill points. For me, i have sold a lot of players through negotiations. twice sold the player for the maximum 20 token and a few at 9-10 tokens..too good to refuse even if they are in the 1st 11. For the 20 tokens ones, i just simply set to max selling price..didn't know there are willing buyers..haha..
So far manage to get replacements at 2-3 tokens only..even the free player from youth academy i manage to sell a couple of them at 5-6 tokens. good profit.