An Art Buyer is a person whose primary role is to purchase works of art. They the link between an agency and artists (mostly freelance) and buys work for the agency. Commonly working for reputable galleries and museums or for corporations and wealthy private individuals and collectors, art buyers usually specialize in specific century artworks, e.g. 19th Century art, and/or specific movements, for example, Abstract Expressionism, Baroque and Art Nouveau.

Art Buyers can also specialize in acquiring distinct art pieces from the 9 most influential major movements of "modern art," i.e.  Impressionism; Fauvism; Abstract Expressionism, Dada, Surrealism, Cubism; Pop Art, Futurism and Expressionism.

They are also Art Buyers who specialize in the works of specific artists whose works are highly sought after on the secondary art market, e.g. Pablo Picasso (1881-1973) Mark Rothko (1903-1970), Cy Twombly (1928-2011), Andy Warhol (1928-1987), Jean-Michel Basquiat (1960-1988).