hi everyone..
i just want to ask where i can get fine(grass/leaf/golden rose) except buying from 8-12 store? i've seen some players selling cheaper 8-12 materials..
price comparison:

8-12 store
fine golden rose 1500g
fine grass 2400g

in some players
fine golden rose 900-1000g
fine grass 1500g

how come they can sell these items at lower price?