The art world is changing. In some ways this is a very good thing. With the advent of the internet, more artists' work can reach a broader spectrum of the public.
However, if you are interested in a piece that you have seen in a gallery, whether bricks and mortar or online, please contact them directly.
However, if you came across work at a show, on social media or in an ad, feel free to contact the studio. Likewise if you have a question about the art, you may communicate directly with the studio.
Art Incorporated, San Antonio, TX
Saatachi Art, saatchiart.com
Masterpiece Gallery, Santa Fe, NM
Galerie Elektra, Sausalito, CA