Street value refers to the black-market price of an illicit or illegally obtained item. The term especially applies to drugs, according to the Oxford University Press.
Street value acknowledges that an item may be worth a significant sum if it is illegal to sell in an open market. Cocaine, for example, has no retail value in countries where it is illegal to possess the drug or sell it in a store. This controlled substance has a fluctuating black market value specifically because of the risk associated with selling it on the street. Drug kingpins have to develop complicated ways of manufacturing and distributing to avoid interception by authorities and pay to prevent violence against smugglers, according to Slate.