George Francomb - Norwich (around 100k) - The best 100k you'll ever spend for a League 1/2 or Championship attacking right back. Put a wide midfielder in front of him with him Francomb hugging the touchline and he'll overlap all game long. First couple of seasons his free-kicks are sensational. Usually gets around 5 goals and 10+ assists when ever i buy him.
Jesse Lingard - Man Utd (loan to released) - Perfect CAM, Hes dribbles and passes like a Premier League star. Will get you around 10-15 goals a season and about the same with assists. Gets released after the first season i think and wants big wages but if you stop him signing for anyone else he drops his demands around September/October and then you've got a diamond.
Jake Taylor - Reading (100k) - Similar player to Jesse Lingard with the same goals/assists ratio in League 1 and 2. Not as good in the Championship for me as Jesse Lindard but a snip at 100k for what you can sell him at.
Abdi Ibrahim - Man City (released after 1st season) - The best ball winning midfield i have ever come across in the Football League. Brilliant in the Championship and you could sell him for £4-5m after a few years.
Off the top of my head there is also Luke Freeman and Luke Ayling who once you get into the Championship you can sell for a massive return on what you buy them for. Michele Fornasier and Dion Conroy are awesome centre-backs for the same reason.