A question "what is the cheapest and easiest synthetic drug synthesis?" was asked in BB Forum.
The question isn't correct because you need to start from the substance categories. We will write cost and complexity comparisons for stimulants, euphoretics, opiates, cannabinoids, and psychedelics.
To answer bluntly, the cheapest synthetic drug is 1,4-Butanediol (BDO).
This substance is easily sold in chemical stores. The substance is metabolized into GHB in human body after consumption. Thus it causes psychoactive effects.
The average BDO dosage is 2 ml, the duration is about 1-2 hours.
Recreational use of BDO is popular in some circles and used as an independent substance, used to reduce amphetamine overstimulation and used for sedation.
In additiom, BDO is precursor in GBL synthesis.
BDO prices
(https://bbgate.com/resources/):
Chemist.eu price: from 1kg/54.00€;
WGP inc. reference price - 1.02kg/110USD;
Amarvelbio (China) price- 1kg/100$;
UWe9o12jkied91d (EU) price - 1.02kg/160€;
Nitrochemis price - 1230g/131$;