Market value is not based on the player's skills, but based on his current contract duration, the demand for the player, his age, whether his position is covered and the price for potential replacements. Basically if he is difficult to replace and there is alot of demand, the value will increase.
If De Jong and Martinez arrive, Fred's value based on his contract and assuming there is demand, will be about 20 to 30 million. If there are no suitable replacements and there is demand, it can go towards 40 million. If there is no demand but the club want to transfer list him, it will be around 10 to 15 million.
If De Jong and Martinez arrive, Fred's value based on his contract and assuming there is demand, will be about 20 to 30 million. If there are no suitable replacements and there is demand, it can go towards 40 million. If there is no demand but the club want to transfer list him, it will be around 10 to 15 million.