Come on... if someone had an amazing 18-year old player, why would they put them on auction lol?

I'm guessing many players don't stay in the game long enough to then sell on any youth players, regardless of how good they.
The ones who do play for longer are possibly training up their 18 year olds to see if they can become even better.

If an amazing 18-year old was available on auction, the bidding war would end ridiculously high.
At that point, wouldn't it be better to plough your T-bucks into your own 18-year old player?