I agree with you all, but if you buy a four stars player with 20+ tokens from your academy he will give performance beyond your imagination. I bought a goal keeper once from the academy stayed with me four seasons and he had rating of 7 and above every game even the ones I lost.

I know it is a steep amount of tokens and that you can buy much better player from the market who may cost you half of that amount of tokens but he may not perform that well.

There is another way to know that the player you are buying is someone's else academy player that he did not sign and released him instead; look for four stars players that cost equal or even much higher value than a five stars player.