Most of us have all the red skins already so we need something to make us grind. (to keeps up playing and keep buying expansions)
Paying high prices for skins might solve your finances but it wont give player an incentive to grind. In a game like this that’s built around grind that’s a big aspect of the game.
There should be a few new skins every month… So far you have not added coin skins in a loooong time.