I have a couple of NYC Piff #3 "Piff Coast Farms - Breeder Cut S2" listed on strainly for $100. These clones are legit from Purple City Genetics.
https://www.strainly.io/en/listings/410440-nyc-piff-number-3-piff-coast-farm-breader-cut-s2
Man - I've been looking for some NYC Piff for a while and stumbled on this the other day. Woohoo - so stoked. Going to pick up a couple more today - hopefully... as I was already at my limit for the day .
Purple City Genetics is pretty good, so I don't doubt their authenticity...