Sherman Cardenas and Freddy Adu are the most memorable for me...
Balotelli was always a good buy when he was the youngster at Inter, it's a shame his career turned exceptional for mostly the wrong reasons.
Rene Adler was outrageously cheap on one of the fairly recent FMs, always a good buy and...
Yep, scouts aren't the fastest bunch if you just assign them to a nation.
Best bet is to quickly scan through the players looking for those with half decent stats, and adding to the scouting pool manually. Use the arrows near the player name at the top to quickly spam through a team's players...
A few but important reasons.
The main one is getting your interest in before other clubs have a chance to sign him. The more clubs interested, the less likely you are to sign him.
The second one is that if you know the date when a nations youth comes through, then your entire scouting for that...
I went Welbeck retrained as a Left Winger, playing Inside Forward. Worked well when he became natural there. Averages 1 goal per 3 matches. Train him on composure when he is natural at left wing, and he will do well.