Years ago, I was lucky enough to order something off of one of the dark web sites that claimed is pure oxy powder C18H21NO4 from china. My tolerance at the time was absolutely ridiculous at 200mg. At first, it was amazing. Highly warming and euphoric like percs use to be to me back it the beginning in my teens, when I could still take 10 m g and be feeling good. Those were the days! Wish it was like that now. Lol.
then on my second order, it wasn't the same. No feeling, nada. It was very high priced and no one believed it was possible to actually order pure powder making me second guess myself. But the first time was real. I felt it and with a tolerance that high, I had a lot of experience.
I'm not sure what it even was. It may of been something else, and being young , dumb and desperate, at the time, I didn't care.
point being, it's possible to still be able to get these kind of things from china, but not easy. And without a lot of money to waste or lab to test thoroughly, it's hard to trust or even know what you are receiving.
it sure would be nice to find something like this, hard. But possible......