IMO the best way to use January is to really target those younger players the FSG model is supposedly based around and go after them.
Coutinho is a good example. Not playing for club, club might think about building war chest for summer or a fee not might help do some good on another transfer and you go get them.
Mahrez is a good example of trying to buy a senior player and getting mugged off.
If you flag enough in advance that a club can prepare and is willing you can do business.. I think VVD and coutinho business was talked out in December or even earlier. the evidence around the players points to it.
Mahrez by city was cheeky as **** really and they got told where to go.
Lemar issue is monaco have 100s of millions in their back pocket and are not needing to sell
Whens the last time we bought a 20 year old type player to develop?