Secondary Market
David Zwirnernews
David Zwirner doubles down on competition with auction houses, launching online consignments portal
The new initiative marks an expansion of the gallery’s secondary market business
Banksynews
How Banksy is vying for control of resales as his market goes ape
Stunt suspicions swirl after Sotheby’s auction sees 2009 work by street artist sell for far more than its £2m high estimate
Art marketarchive
Auction sales of art shrank again in 2003
Figures show between 1.2% and 17% decline in turnover