I've just been lucky with trading, buying/selling at the right time o: Made over 100k just on IF Aguero yesterday, and sold a load of players I got cheap-ish the other day.
I've pretty much emptied my club though, apart from the players in my squad, theres not really much else left
IF Pedro looks like he could be a decent investment btw, his ingame stats are incredible and some DB sites have his workrates incorrectly down as High/High (not really desirable for an attacking winger!). He's actually High/Low, and with his 5 star weak foot he's an insane bargain. Once the masses find out he's High/Low I can see him possibly going up.