Online anonymous marketplaces are a relatively recent technological development that enables sellers and buyers to transact online with far stronger anonymity guarantees than on traditional electronic commerce platforms. This has led certain individuals to engage in transactions of illicit or illegal goods. 

This reports presents an analysis of the online anonymous marketplace data collected by Soska and Christin [13] over late 2011–early 2015. In this report, we focus on drug supply coming from the European Union. Keeping in mind the limitations inherent to such data collection, we found that, for the period and the marketplaces considered:

• EU-based suppliers represented a significant share of all drug revenue—approximately 46% of all drug sales.
• EU-originating drugs primarily came from Germany, the Netherlands, and the United Kingdom.
• Cocaine and other stimulants altogether represented a majority of all EU-based drug sales.
• Supply of New Psychoactive Substances (NPS) was heavily concentrated in the United Kingdom, and remained very modest with revenues in the order of EUR 3,000 per day at market peak.
• Marketplace vendors primarily catered in the retail space, but there was evidence of larger (bulk-level) sales. Volume-based discounting tended to occur, albeit at relatively modest levels.
• Half of the vendors specialized in one type of drug; and half of the drug sellers tended to stick to a given weight echelon.