There are a number of shops around the world, usually found in villages,
cities, and other settlements. Most of these are run by either a city or
individual players and only sell their goods. However, there are resource
centres, also known as Trade Markets, which will often be willing to
purchase raw resources and commodities from you.
Trade Market prices are controlled by the government of the settlement in
which the market has been built. Certain Trade Markets may pay out more or
less for a certain resource depending on the demand for it. Some may choose
not to buy a resource at all if they already have a surplus of it.
To sell a commodity, seek out a Trade Market and type SELL <qty> <commodity>.
Syntax:SELL (<qty>) <commodity>