Well, I am planning to get him as well, but definitely not in fateful choice event simply bcoz I rather pay 100% fixed price or more in case I'd get power items, than rely on RNG. His regular price is about 14~16k, but when you aren't using ingots, buying only ninja fragments with coupons in fateful choice is a waste, if you are f2p/or low spender like me. I really dislike that event and if you don't have ingot spending synergy, it's even worse. So if I were you, I'd wait a bit, save about 10-12k coupons and buy him in one of the future events.