intrested in importing a container of mixed granit

I'm a small time fabricator on the west coast that would like to start importing or buying wholesale crates or mixed containers of Granite (http://tanbrown.org) . Also could someone explain the metric system that is used to price Slabs (http://www.VerdeUbatuba.com) . I assume a M2 is a square meter. (is it?)
thanks a million