The vendor X-taz420 on Alphabay is selling coke and weed and ridiculously cheap 'special offer'/'sample' prices. There are several threads in the scam reports section of the AB forums about him, people who have made orders and then get a message threatening to shop them to the police unless BTC is sent to a certain account. He also sends phishing links and at least one person on the forums has had their account hijacked.
There is no gray area or room for doubt, the guy is a full on scammer. This is a message he allegedly sent to a forum member:
"let's be real then... made more than 12 000 dollars within 3 weeks.
Humans are weak, always fall for low prices"
This has been known for well over 24 hours now and his account is still active and probably still taking orders from the gullible. Alphabay, pull your finger out and ban this piece of shit.
P.S. It is very likely that this scammer is working with/the same person as greenGARDEN. I am not 100% sure about greenGARDEN as I haven't interacted with him but based on what the people in the forums are saying do not trust greenGARDEN as they are very very likely also a scammer.
I saw his profile 2 days ago. Looks definitely like a scammer