Buying illegal psychs online. Any thoughts?

Hello everyone. I want to hear your thoughts about something I am considering. I recently looked online for bufo alvarius toad venom and I found some on a popular sales and auction website. The other items the seller had we're tabs of Lsd (cleverly labeled something else that only hinted at what they were), and caapi, things like that. In the descriptions, she has a website. I went to the website and it was blocked by a password. Anyways I contacted the seller and I asked about the tabs to confirm what they were and I also asked her about the password protected website. She(I'm assuming it's a female) conirmed that the tabs were 100ug lsd tabs and she gave me the password for the website. The website was a shop filled with all kinds of natural psychedelics and herbs like legal hemp. Most of the items were legal or in a grey area. There was mimosa and San Pedro cactus. On the listing it also says that she sells "stronger cactus", which I assume to be peyote. I want to know y'all's opinion about this seller. First of all I am quite Intent on only having real lsd. I do not want to risk relieving fake lsd. I really have stopped using L out of fear that I will get fake stuff. I plan to use it for microdosing and tripping. Do y'all think it's safe to buy lsd from this seller? What about peyote cactus? I am worried about it going through the mail or getting ripped off.

On a related note does anyone know about the effectiveness of microdosing mescaline?

Edit: after more searching I realized the same person also sells some other illegal substances like magic truffles, dmt, and THC.

Edit: I have talked to him online and he seems relatively trustworthy. He was helpful in telling me how to use the products and answered questions I had. He also claims that his LSD is legit and told me how to test it for myself. I know I can't be sure based on this but I think it's useful info anyways.