Art Brokerage - Buy and Sell Fine Art - Art Dealers and Artwork for Sale. Art Brokerage is designed to make buying and selling art online safe and easy. Our staff has more than 200 years of combined experience selling artwork.. fine art, art gallery, art sales, buy, sell, buying, selling, Andy Warhol, Leroy Neiman, Alexandra Nechita, Jerry Garcia, John Lennon, Erte, Pablo Picasso, Richard MacDonald, Andrew Wyeth, Royo, Bill Mack, Roy Lichtenstein, Ed Ruscha, Frederick Hart, Marc Chagall