I can't seem to find a place to buy them anywhere in Limsa?
I feel your pain. I'm at level nine alchemist and need more water crystals. You get crystals from mobs you defeat.
I couldn't find a place to 'buy' them and the 'market board' had none to sell. Perhaps things will change once thousands more people are on the serverfs. lol
Name: Ghost Orchid - LEVEL 50 Bard, BLM, WHM, SMN Craft Level 7 Lucis, 6 4-star crafts: CUL, MIN, Wvr, Bsm, Gsm, Arm, Lth, Crp (Fishing and Alc at level 50)