I don't know if this is mentioned before as I could not find anything related, but a refresh button for available players would be nice.
The problem is that the game doesn't renew the list of the players being sold and it needs to reload the whole game for it to show the newer ones. A refresh button in the transfer list would be most appreciated.
Posting it in the bugs, because I think that's a bug (sometimes it reloads itself without me doing anything, but most of the times it doesn't - a button is a sure fix).