The average price of a gram of Amphetamine costs 38$, the demand for it is Very High (Best I found was cut 3/1 by the dealer himself, likely cut even more up the chain).
The average price for weed is around 8$-40$ depending on where you live in the country.
Cocaine is ~180$ per gram. Don't have a lot of personal experience with the substance.
MDMA is rarely if ever sold in non e pill for, the average per pill price is 30$, I don't believe the MDMA% per pill is high (from personal experience).
In terms of resale value, what would be the best substance to start off with?
R those your street pricessss