I have...
all 2*-4*
100ish golds or so, but lots
Don't want to tell about rainbow.
@maotd I can't trade pachinko ball in my region, so never bother.
PS: Anyone here play FGO? I try a bit and it seems like it's not too friendly for F2P. (I might spend a bit on FKG but I am F2P for most of gacha game)