Grey imports limit a company's control over its own products.  A free flow of goods is not always an automatic good. The extra transport and pollution involved in grey imports alone is a serious argument against it. Grey importers often do not make clear that products sold under the same brand name in different markets are in fact sometimes tailored to suit the local market environment. So, for example, one of the reasons for lower pricing in some products in particular countries is that they do not include all of the same ingredients as a product sold under the same brand name in another country. This can be, for example, because the performance needs (e.g. the climate), regulatory framework, or consumers' willingness to pay in the two countries vary. Accordingly, in the importing country, consumers may end up paying for a familiar brand that is not actually as well designed for their needs as the domestically marketed version. 1 There are many practical problems with grey importation. For example, consumers may not understand usage instructions.  1 Santos, Botchi, 'Why locally sold cars are still better than grey-market options, 26 January 2010