Waiting for Cursed Hidan pricing! Since in Lucky Board it cost about averaging 15k coupon/ingot for 80 frags and comes accompanied with so many goodies from the board. Hope this one will cost lesser, maybe 10-12k at least. Lower will be better. But if it cost the same, then it'd be a bummer.

So technically, it is cheaper than lucky board in terms of actual usage of coupons/ingots. Since lucky board 10 Dice (200 coupons) gives an average of 60 points which is equals to 1 Cursed Hidan Frag. This one gives 1 Frag for approximately like you mentioned, 157 coupons, so its close to 25% cheaper.

This is tough, might just try to get as many frags as possible now, in case he never comes out for Lucky Board ever again, then once you recruit him, full force ahead with all coupons into power. ;P

He appeared in Survival for me.