Three times this season, other teams have came in with offers for key players on my team (Lucas Digne, Gylfi Sigurdsson, and Idrissa Gueye). For all three, the bids have come in under the value of the player (Gueye's can be seen below). The players all had multiple years left on their contract, were happy at the club, and were not listed for transfer. Any ideas on why this could be?