Some countries's transfer market is extremely inactive due to the limited number of users in that country.
Just the way how the message board notifications raised the activity of the message boards in general, a similar system can be implemented to re-animate the transfer market (domestic) for countries with small number of users.
This can be difficult (and annoying) for countries with large number of users, so this system can be limited to a few countries (or even a message board solely for the transfer market).