I have perused various teks available online and extraction seemed to be a lot of work, at least compared to a dmt or mescaline extraction. You cannot use a simple STB or A/B extraction with kratom, right?
As far as I know, you are correct. I was instructed on how to do these extractions by somebody else. Thus, my knowledge of the process is as technical as that of somebody who learns to make a soufflé by imitating a chef. I only know what to do, not how it works scientifically or why it works theoretically.
Also, from the sources I have seen 7-hydroxymitragynine was very expensive compared to buying leaf.
That's because the sources you've seen were esurient, money-hungry, perfidious, and unscrupulous. They simply wanted to milk as much money from buyers as they could.
A niche, recherché drug like 7-hydroxymitragynine is by virtue a rarely sold drug, and prices are not set by the standards of the market but by the caprice of individuals.
This is because there doesn't really exist a market sizeable enough to allow for competitive pricing or to possess a sufficient supply of brokers. This does not allow the prospective buyer to explore cheaper alternate purveyors (as there is an extreme paucity of purveyors of which to survey), so they are essentially forced to pay whatever inordinate cost a dealer sets.
A result of this scenario is that a seller can arbitrarily price his products (usually to an exorbitant and prohibitive extent) and any potential buyer is faced with the dilemma of either forgoing the purchase in lieu of keeping their cash or either complying with the unreasonably high expense incurred by making the purchase.
Whereas drugs like heroin, morphine methamphetamine, cocaine, etc., are competitively priced (i.e., prices are dictated not by the vagaries of dealers, but by the prices of the competition within a given geographical or socioeconomic ambit and, to a lesser degree, the learned expectations of the clients), uncommon drugs do not enjoy such price restraints.
Personally, I cannot find there to be any justification for this drug being expensive,because:
1.) Kratom is cheap, readily available, and legal (in most jurisdictions with which I am familiar; but even if it were illegal it is still easy to procure—even in bulk—because it is a plant that takes as much expertise to grow as do tomatoes or watermelon or opium or whatever).
2.) The extraction of kratom's primary psychoactive alkaloids is an arrant cinch for anybody willing to invest about a couple hours of research. But you may disagree, since difficulty is always, for anything, a subjective quality and matter of personal opinion.
3.) The extraction process is affordable and does not require any hard to acquire accoutrements or equipment, and the equipment that is needed is cheap and readily accessible.
4.) The amount of laborious or the quantity of time one needs to invest from the start to finish of the process is relatively insignificant.
All these factors are such that, when taken together, the minimal price at which one stands to make a worthwhile profit, account for overhead, and is remunerated for labor and risk should be very low. In my opinion, the price of a gram of even pure 7OHM should not exceed, say, $50—if and only if it was made via synthesis rather than extraction can I accept a higher price.
Anything more costly than that is the result of patent avarice and pure greed. That's my opinion, and you are at liberty to dislike it or disagree with it.
Have you found that it is feasible to purchase these extracted alkaloids at a comparable price per dose ratio compared to straight leaf?
I'm not sure I understand the question.
1.) What do you intend to mean by "feasibility"? Feasible in terms of cost, accessibility, practicality, or something else?
2.) Why would it make any theoretical difference in feasibility or any other variable at all if the price per dose ratio is comparable between the extracted alkaloids and the alkaloid-containing natural substance, inasmuch as cost or economy is concerned?