If you mean put players for sale just go to the player you what to put for sale and click on the "transfers & contract" and then "sell player" and chose a reasonable price. If you mean that nobody will by buy your players then 1) lower your price if you haven't already, obviously don;t lower it to a ridiculous amount, and then still if no one buys your player then nothing you can do happens to me all the time. Hope that helps.