This question is very simple, Who thinks we should be able to buy regular and gold crux chest in the alchemy with our mithril. Devs can set the limit on what they cost.
They will be for sale on black Friday. That's the only time they get sold. Your mith is dead now btw. Stats made it unless.
I'm sure he means buy them with our mith, but yeah they'll get sold on Black Friday, gold for the price of a seal and regular the price of a horn.