Hero Eggs not purchasable

[Vexinimous]

Howdy all. When trying to purchase Karahan Hero Egg, it says "The Sale Period is over so you cannot purchase the item." Is there any way to know when the sale period was/is? I just dropped money only with the intent to get some, and here I am -_-. Any input or insight is appreciated!

[Zengeroff]

That was from an event last month I believe.

Probably just oversight by the devs and they accidentally left them on the storefront.