Mysterious Crystal - Can you sell them at smaller quantity?

[Alysha Hawkeye]

Mysterious Crystals are needed to transmute those Flawless Hongmoon Gems. F10 sometimes have them in different quantity each time they appear. At the present, they are in 15-unit package. 

 

The thing is that I sometimes only need a few more crystals for my heptagonal gem. I don't want to buy 15 of them. It is a sales trick where they try to force you to buy a bulk of of an item where you only need a few. Sure, I can save them for later, but I don't have any intention for another gem for a long while. And I never know if they would introduce other ways to get crystals, so I don't want to risk wasting my precious coins.

 

My suggestion is that just allows players to buy them at smaller quality. Prefer to be 1 at minimum. Let us buy  as many as we desire.