Black Market, Black Economy, Grey Market, Gray Market
A black market is one where the buying and selling of products and services take place in an illegal manner. A black economy is a highly organized and vast market where the regular taxation rules and norms of trade are not adhered to. A black market is known by several names, including black economy, underground market, shadow economy, underdog and parallel economy. The variety of goods traded in this market is enormous and the most commonly traded black market items are:
- weapons
- currency


