Look, for 18 years old that are very expensive (Nordeus Gens), they usually show up at the beginning of each season but they will also show up during the "quite time" of your server, when people are not selling players. Buy them, power train them and give them time on the field to develop, the quality should be 1before scout i.e. scout is 60, you should get a young fellow rated 59 to get the max out of him Good luck!