I don't really believe into rare sats.  In my view, such concept was "invented" by those who wanna sell the salt to a slug ^{(and cheat others)}. In essence I believe in the equally valued sats, i.e. 1 sat = 1sat ^{(no matter of their ordering)}. Thus for those who are inclined to buy such stuff at an overprice I would recommend to have an excuse for themselves for their latter breakdown.