There should be a sort of trading in League of Legends for skins

I think that in this trade it is like if you don't want a skin but you have one you can trade a skin for another one. for example, I don't want pulsefire Ezreal but I now am playing uydr. you can trade pulsefire ezreal for another skin like Spirit guard Udyr. but you can only trade one-time pre-skin i think that League of Legends should incorporate this maby other details to i just think that this is a good idea