It has been said multiple times for the past year and a half that they can't implement this. This thread need locked because it has been attempted and it did not work out and the devs have addressed multiple times as to why it didn't work.
Regarding your first post-- The price of these war xtals would change depending on how big your stats are, the price in the pics are just examples. Regarding your second post-- This actually helps to take out the p2w by allowing more people to xtal during a war, making it a little more even.
Support! It's about time! I have been waiting quite a bit between war for xtals, only to dump them on wars
Support - this topic should be locked. Mods wake up! We already got an answer from develpers: not going to happen! Devs instead implemented a random refund of used xtals - good enough for me!