On arriving at level 4 the trading option is enabled so you can trade players.

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How do I put my players in negotiation?
-On arriving at level 4, the players who are with quality close to turning scout with 6 stars (39 quality) these are selected automatically by the server by placing them at the disposal in the transfer list by negotiation without you even knowing.
These players are subject to receive offers from other managers from the same server.


But how do I remove them from the transfer list?
There's no way, they are automatically selected by the server, the only thing you can do is to reject the offers received to their players if you want to not sell them

How do I hire a player through negotiation?
-Suffice to go on transfers, Negotiations and choose the player you want to buy, but there will be a time of 24 hours for the seller evaluate your supply fitting to accept it or not.
Tip: if you want to buy the player through negotiation offers a value more than is charged to give a starting bid of 3 ~ 5 tokens more!
For example, it is charged 7 tokens to give a starting bid, slide the bar causing it to appear between 3-5 tokens as in this image below


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these tokens will go to the owner of the player if he decides to sell

I hope you understand my English