I take care of it, because i want to know what i`m selling. My way of thinking is not, what i don't see, i don't care. I'm interested at the game and not only at my team.

Further i think, there are much training points and if i sell that player, the points are lost like they never exist! Where are they??

The objection of khris sounds plausible! If I buy a player, i want to feel free what i'm training. But a good function could be, that you can decide after purchase if you want to keep the training progress or if it should be deleted.

What about this idea?