What do you write in the subject and body of the email to A. I mentioned the word Nembutal in subject . Not sure if that's allowed and he would reply.
What you wrote is fine. I used "Nembutal Purchase" as the subject and he replied to me. Just be patient.
As for the body of the email, I kept it simple:
Hi (A's name),
I am interested in purchasing two bottles of Nembutal. Could you please provide me with the cost and payment instructions?
Kind Regards,
(my name)
Make sure you email him from a Protonmail account or else he probably won't reply. These are free to create.