My players are not sold even though they are the lowest price in the market

so - most likely you are trying to sell players for which there is 999+ supply (blue prices) and no demand (red prices) ... if you see a red price, then click on it and your player will sell, otherwise if it is just blues then you are in the queue with everyone else and likely the player will not sell as there is no demand at that price

also, don't post your user id on public forums - you never know who might try to do something nasty with it