I would not call btcboss2022 a scammer at least not by purpose. I actually believe he honestly tries but there is a problem. The methods described here on the board are actually arbitrary, say it is a matter of chance which stereoisomere crystallizes out first and this will be in excess in the formed salt. It can be d- one time and l- the next time and yes 70 to 30 that is exactly what you get this way. Now if you do not have a polarimeter to check the optical rotation yourself (easy) then you get nice crystals and as the videos and posts here always claim it will be only d- you think "Great! Crystals! Must be d-Meth!".
That is why I believe it is wrong to call btcboss2022 a scammer, if he does not reimburse you or provides useful material, well that would be something else.
And of course it is an obvious fact that you will not be able to buy d-Meth of good quality, say 85% or more d- for less then 30 €/g and thats for kgs. As the effort and costs of manufacture are just very high and anything less makes economically zero sense.
The same applies for any drug which is synthesized in clandestine labs. If one owns a chemical plant, well then you can make all this for next to nothing, in excellent quality. This was proven with the Imhausen XTC in the 80's, best MDMA pills ever on the market.
If somebody is interested in making a video or picture tutorial on how to check (roughly) optical rotation by very simple means available to everybody PM me and I will provide him with what he needs to know, I just have neither time nor nerves for this.
I also do not like that it is made to look like Chinese are more often scammers then others, its not true. I found Chinese to be rather honest businessmen with the only drawback that you cannot get a refund ever as they rather die then give money received back. But they are quite willing to compensate in goods so necessary. Scammers or outright thieves and robbers are to be found in Nigeria (of course) in South Africa (not the black), all Arab countries (not-muslims are always game) and top is Australia (every crime thinks he is Ned Kelly reborn).
The list is absolutely subjective, but as it is by me it is hereby declared gospel