The sale of crude oil by governments and their national oil companies (NOCs) is one of the least scrutinized aspects of oil sector governance. This report is the first detailed examination of those sales, and focuses on the top ten oil exporting countries in sub-Saharan Africa. From 2011 to 2013, the governments of these countries sold over 2.3 billion barrels of oil. These sales, worth more than $250 billion, equal a staggering 56 percent of their combined government revenues.