N2 - Background Users of darknet markets confer with product quality as one of the motivations for buying medication there, and distributors current high quality as a selling level. However what customers understand by high quality and how they evaluate it's not clear. This paper investigates how customers established and in contrast drug high quality. MethodsWe used a two-stage technique for investigating customers' assessments. The user discussion board of a darknet market that we called 'Merkat' was analysed to develop emergent themes. Qualitative interviews with darknet users had been conducted, then forum data was analysed again. To boost the applicability of the findings, the discussion board was sampled for customers who introduced as dependent in addition to recreational.ResultsQuality might imply reliability, purity, potency, and predictability of effect. We centered on the completely different sorts of information customers drew on to evaluate quality. These have been: embodied; craft; and chemical. Conclusion.Users’ evaluations of quality depended on their experience, the purpose of use, and its context. Market forums are a case of indigenous harm reduction the place users share advise and experiences and might be usefully engaged with on these terms.Highlights:• We examine how darknet market customers assess drug quality• Market forums permit users to use embodied, craft and chemical data to match the quality of various products• Good high quality doesn't essentially equate to excessive chemical purity• Different medicine are assessed with completely different priorities in mindExpanding the range of data varieties that users apply to product quality may have optimistic implications for hurt discount

AB - Background Users of darknet markets confer with product quality as one of the motivations for getting medicine there, and vendors present quality as a promoting level. However what customers perceive by quality and the way they evaluate it's not clear. This paper investigates how customers established and in contrast drug high quality. MethodsWe used a two-stage methodology for investigating users' assessments. The consumer discussion board of a darknet market that we referred to as 'Merkat' was analysed to develop emergent themes. Qualitative interviews with darknet users were carried out, then discussion board data was analysed once more. To reinforce the applicability of the findings, the forum was sampled for customers who offered as dependent as well as recreational.ResultsQuality could mean reliability, purity, potency, and predictability of effect. We focused on the totally different sorts of information customers drew on to evaluate high quality. These had been: embodied; craft; and chemical. Conclusion.Users’ evaluations of high quality depended on their experience, the purpose of use, and its context.