The original suggestion seems to be that we should do something about the price for which players are sold. This is something we can only very indirectly influence. RS prices should not be compared to real life prices. We try to stay in the same range, but it is a completely different economy.
That being said, the new facility levels will indeed have a major impact on the transfer market. This is intentional, as we explained in the announcements regarding this change. Eventually this will improve the market, but there will be changes. Eventually it will be a good idea to update the calculated market values, but it is too early for this.
22 year old players are not interesting because they can no longer play in U21. There are a lot of people selling players at this age because they are not yet good enough for the main team.
There might be some teams that could use them, but players with similar potential are a lot stronger at 27 than they are at 22.
It's not a good strategy to try to earn money by selling 22 year old players. The demand for these players is much lower than the supply. In real life most of these players would probably stop playing professional football and you'd just never hear of them again.
The calculated market value is an indication of the value of the player based on the stats of the player. It does not take supply and demand into account. Players that are rare (like the really good super talents) are sold for much more than their calculated value and players in abundant supply can only be sold for much less. This is normal and does not mean that those market values are wrong.
Maybe the solution would be to increase the amount players can be sold to the bank for, but that would need to be thought over well.