To anyone who doesn't realize, you can buy Elementalist Lux for only $25. That one skin has 9 unique costumes all with different VFX and unique voice lines.
So if that's the precedent set by Riot-- that a very high quality skin that includes a ton of content is priced at $25-- why would you, as a sane individual, pay upwards of $100 dollars for a skin that is only a brass version of a different one, with nothing unique?
I reiterate, the color BRASS does not make something worth GOLD.
(nevermind the fact that in addition to the price, Prestige K/DA Akali in her shroud looks god awful compared to the base skin)