Recently i've been thinking about the methods that worked a treat last year and this was one of the more successful methods throughout the whole of FIFA 15. If you don't know this method here is a quick run through it:
Buy a player for his cheapest BIN - eg. Ter Stegen for 1000 coins, buy 4 rare gold contracts at 250 coins (1000 coins) and a cheap chem style for no more than 200 that fits the style of the player. so all together you would pay 2200 coins for a ter stegen with 99 contracts 99 fitness and a cheap chem style.
Similar to the NIF and IF method threads that already exist, you want to list for an inflated price compared to the rest of the market. Yesterday i sold a Ter Stegen for 5800 but removed it from my TP, also sold a mata for 7000 coins, which on both cards resulted in a 7k profit, i only had a hnadful of cards which had 99 contracts and already 2 have sold on for more than i would've thought.
So this year it appears that this method is back! Feel free to post any pictures of you selling any cards or any questions or improvements to this method.
TIP: you can try to win rare contracts on bid for 150/200 and maximize your profits!
FACT: This method does not make you rich overnight, it takes time!