There isn't necessarily an optimal age to transfer list, that depends on a lot of factors such as skills, time of the season, potential. It's very player and manager specific. What amount of $$$ are you willing to give your player up for? If the market is willing to pay that price maybe its time to dump them. If not hang on til you get what you want or they have developed further.
FC
Edit: Point is there is no optimal age to sell but you will notice a decent price drop between 18 -> 19 and 19 -> 20 and then a smoother decline like an inverse exponential curve.
Last edited by FatCurry at 6/4/2009 4:28:27 PM