"The global opiate market was valued at US$68 billion in 2009, with heroin consumers contributing US$61 billion. The value of the world heroin market tends to increase according to the number of international borders crossed by traffickers. That is, heroin is generally cheaper in Afghanistan, a production country, than in West and Central Europe, where the drugs have been transported by various means across long distances and changed hands a number of times. However, this pattern can be deceptive, as heroin prices and consumption levels vary significantly across countries and regions.
"Heroin prices fluctuate significantly across the globe, and Australia is the starkest example of global price variation. Although Australian users represent just 0.85% of total global heroin consumption, they contribute 4% of the global market value. The street value per gram of heroin is between US$230–370 in Australia whereas one gram of heroin was worth around US$170-200 in the USA and northern Europe, and consumers in West and Central Europe paid US$40-100 per gram. Overall, the Russian Federation and West and Central Europe contributed almost half of the total global market value, accounting for US$31 billion in 2009."
UNODC, World Drug Report 2011 (United Nations Publication, Sales No. E.11.XI.10), p. 83.