What do I do with unneeded young U12 players?

[Yotam Dobrin]

Always sign 0 token youth players!! You can sell them for good money instead of just releasing for free!

As for the other player if you really really have no way to get tokens then release him or wait 7 days till he leaves by himself, I think there's no difference.

And when will the new players arrive is shown in your stadium section when you klick on U21 facility:

Both players costed 15 tokens. One of them wasn't any good, so I let him go. The other is a solid player, but I don't have enough tokens to buy him. What should I do?