Demon Blood is Uncommon
Ever try siphoning blood from a live Netherdemon? It's no easy feat. But if you'd like a vial of this phenomenal delicacy, you don't have too many options. Either risk certain death, by confronting the demon yourself, or pray that the Talmuth tavern is selling you authentic, corporeal ichor.
If you do happen to acquire the real stuff, you'll be left feeling quite satisfied, as you guzzle down it's sweet-tasting nectar. If you've been scammed however, precautions may be in order!