The Gemstone A are severly overpriced. 750k? come on... If the event was like last year's, it would only cost about 38k...
This will stuck 'non premium' in B Grade Weapons forever, 'cause the cost to implement a rune in A-Grade Weapon will be HUGE (108 Gemstone A x 750k each=81 million adena, and this is ONLY for the gemstones)