I'm not sure, but I've been saving for one. I heard 250-300, but havent seen one found and sold for a while and it seems like there was inflation from xmas event.
Techs like Jellen and Zalure will turn your character to face the enemy, attack techs do not. You can cast Z, then start spamming Rafoie without looking and know you are locked on. Not ideal, but it works.