This, you must know, is just a virtual enhancement gemstone, and its value can be seen from this alone.
An enhancement crystal is an implant. A level 20 character can have three enhancement slots: arm, head, and trunk. Because in the past, enhancement crystals were items that would not be lost upon death in the game, their value was often higher than ordinary equipment. Of course, in this world, this advantage has lost its significance, but it still doesn't lessen its preciousness.
At least, from the lesson of Azure Light Piercing, enhancement crystals at least won't be lost.