If you want to have sucses with negolations firts chek manager lvl before bid,if he is your lvl or +1 he will not exept so look for other player who is in team few lvl bigger than you.Some ppl sold players in negolation for 2-3 tokens some want mutch more.
All players in negolation always need just 1 skill point for next star.Player who need 1 more skill point to be scout going in negolation automatic.You can looking for friends who are 3-4 lvl bigger than you(if have biiger in your server)and speak with them to buy all theyr young players for good price.You need to be friends and in one server.From friends who are in your server you can buy all players who are 3-5*.No one can put player in negolation they going auto when need 1 skill point.Its good to find manager who is 3-4 lvl bigger than you and lower than you.From bigger you can buy 18 years old players ,and to lower you can sell your players.If you want this sistem to work good you need to be friends not only in T11 you will need to speak.