Elevator Pitch: A Pandora for art.
Art: From Picasso to Basquiat.
Price Range: From under $1,000 to more than $1 million.
Bragging Rights: Since launching last October, it’s shown almost 80 million artwork impressions.
Boldfaced Supporters: Dasha Zhukova, Twitter founder Jack Dorsey.
Big Friend: Larry Gagosian is an advisor.
Fee Structure: Charges the gallery partner a commission on the purchase up to 6 percent of the sale price.
Elevator Pitch: A virtual auction house with themed and benefit sales.
Art: Depends on the auction: Warhol and Koons were on the block recently.
Price Range: Works valued up to $50,000.
Bragging Rights: Last December, the site had a $4 million bidding day during a benefit auction.
Boldfaced Supporter: Chanel, through its investment firm Mousse Partners.
Big Friend: Marina Abramovic has curated an exhibition.
Fee Structure: For benefit auctions, there’s a 5 percent to 7 percent commission; for themed ones, there’s a 6 percent commission and a 12 percent buyer’s premium.
Elevator Pitch: A 24/7 eBay for art.
Art: Typical hang-on-your-wall stuff and pricier works by artists like Keith Haring.
Price Range: From under $1,000 to more than $100,000.
Bragging Rights: Warhol’s Flowers (1978) sold for $1.3 million on July 20, 2011.
Boldfaced Supporter: It’s an extension of parent company Artnet, formerly an art magazine and now focused on its art index and auctions.
Big Friends: Christie’s and Sotheby’s, who keep an eye on the index.
Fee Structure: A 15 percent buyer’s premium.
Elevator Pitch: A platform to buy from big galleries and museums.
Art: Contemporary art—think Richard Prince, Alex Katz.
Price Range: Up to $150,000.
Bragging Rights: In 2012, the site generated $1.5 million for its cultural-institution and nonprofit partners.
Boldfaced Supporter: MTV founder Robert Pittman.
Big Friend: Heiress Maria Baibakova is the strategic director.
Fee Structure: A percentage commission fee charged to the vendor.