The use of online pharmacies for the purchase of medications is a widely accepted practice used by consumers looking to find inexpensive and embarrassment free ways to purchase needed medications in a discreet manner. The researchers also found that even when websites offered a questionnaire with the promise that a physician would review the form, nothing was generally known about the doctor's qualifications, and it was easy for users to provide false information to obtain a prescription.
The Research and Documentation Centre ( Wetenschappelijk Onderzoek- en Documentatiecentrum , WODC) on behalf of the Dutch Ministry of Security and Justice ( Ministerie van Veiligheid en Justitie ) commissioned where to buy ecstasy pills RAND Europe to characterise the scope and size of drugs trade over the Internet and to delineate potential avenues for law enforcement for detection and intervention of these activities.

This seems very similar to EMCDDA estimates about drugs sold offline, apart from ecstasy-type drugs (just three per cent of the total European retail drug market) and heroin (28 per cent of the total European drug market, but just six per cent of the total drugs sold on cryptomarkets).
Essential darknet resources, such as community forums for vendor reviews or specialist search engines, have been rebuilt from the ground after police seized them Today, these services allow users to search for any drug, sold by any vendor on any market, enabling trade to flow more freely.

Online Pharmacies: Many online pharmacies operate in a legal gray area and are not actually licensed to dispense drugs in the U.S. There is no way of knowing that the drug purchased is real and hasn't been adulterated with other substances or stored improperly.
When they are unable to make the necessary sacrifices and roll up the sleeves and get to work and get out there to find the right people to speak with and build that network; then soon find themselves going back to that "Job they were supposed to replace" asking the "Boss they were supposed to fire" for some overtime to pay off all the credit card debts accumulated while trying to "build that business" and meanwhile now hiding behind the caller I.D. for all the harassing collection calls.
In addition, international cooperation and coordination (and the accompanying legal challenges), capacity and resources and (technical) capabilities could play a facilitating role in deploying the different strategies to tackle Internet-facilitated drugs trade.

The other problem here is that the studies that are conducted in this area are subject to much controversy as these studies use typical drug user interviews for their facts and illegal drug users tend to be very shy about their drug habits and very likely their testimonies are highly fabricated.