Art Areas
Online Art Dealer
Fine art for sale, and a variety of other arts-related services.
http://www.artareas.com

Art exchange
An art gallery website, a source for buying paintings, limited edition floral, original fine art print, watercolor giclee print, bronze original sculpture and art poster reproduction.
http://www.art-exchange.com

Art Link: International Young Art
http://www.artlink.com
From their website: "ArtLink was launched in 1996 with the dream of making an international cultural impact by bringing young and yet unknown visual artists to the fore, providing the world with available, accessible and affordable, quality art of our time."

ArtLondon.com
An online fine art marketplace, featuring paintings, prints, and photographs in a range of genres and styles by international and UK based artists. Also features arts stories.
http://www.artlondon.com

ArtPatron.com - brings artists and art patrons/purchasers together - post your art and patrons bid:
http://www.artcraftmall.com/

CD Baby
http://www.cdbaby.com