Change in stocks of goods and services. ... Included are the stocks of goods and services bought for the sole purpose of reselling them in the same condition. Excluded are stocks of goods and services which are provided to third parties on a commission basis. Products purchased for resale and stocked by services enterprises can include goods (industrial equipment in the case of 'turnkey` engineering contracts, or buildings in the case of property development, etc.) as well as services (rights to use advertising space, transport, accommodation, etc.).