I need a little help to figure it out how to remove a unit from a selling unit, if each player has 1 selling unit of its own.
Ex: if Player 1 buy unit1 from its selling unit, the unit is removed from selling the other players cannot buy that unit from their selling unit
Ex: if Player 1 buy unit1 from its selling unit, the unit is removed from selling the other players cannot buy that unit from their selling unit