well I bought yesterday with 1 token a player - ST 21 y.o. , 4* -77% quality, to sell him through nego and get 4-5 extra tokens.
Didn't use so far any extra training (with greens).
Today I decided to put him as a sub in an easy game, maybe to score a goal and have little more attractive stats.
That's the result
Click image for larger version.  Name: nego injury game.jpg  Views: 139  Size: 76.4 KB  ID: 97812



Now he is at 78% and 9 days injury.
I hope maybe someone see him and give an offer.
Click image for larger version.  Name: nego injury game player.jpg  Views: 135  Size: 63.9 KB  ID: 97814

* btw, if anyone here is LV40 and server 38, I 'll give him with 3 tokens
Don't worry, nego players don't transfer their injury, only their fatigue.

** @casper was watching that game (thanks mate)