Everything is worth exactly how much someone is willing to pay for it. Want lower prices? Don't buy anything at high.
By your logic, you should NEVER EVER use the Cash Shop in this game ever.
Never buy incense when you have used your 4 hours of incense already.
Never buy mount feed after you've used all your daily 10.
Never buy a purification scroll.
Never buy a serendipity upgrader.
Never use the cash shop. Period. End of story according to what you said above.
We are talking about the cash shop here, not talking about what people put items in the AH or in world shout for.
We have absolutely NO control over the CS prices, except what we are doing here.
Legitimately complaining about the prices because they are SEVERAL TIMES higher than that of RU.