Some items are also seen as being treated as if they were commodities , e.g. human labor or labor power , works of art and natural resources , even though they may not be produced specifically for the market , or be non-reproducible goods . Some other priced goods are also treated as commodities , e.g. human labor-power , works of art and natural resources , even although they may not be produced specifically for the market , or be non-reproducible goods .