Colin Gleadell highlights the few—but signficant—works that didn’t find buyers:

The price of Ai Weiwei’s ceramic sunflower seeds, so effectively exhibited in Tate’s Turbine Hall in 2010, crashed last weekend as Sotheby’s began its seasonal Asian art auctions in Hong Kong. In 2011, a 100-kg mound of the seeds sold in London for £350,000. But another mound of the same size and from the same edition, estimated to fetch at least £165,000, found no buyer on Sunday. Other works by once popular artists Yue Minjun and Xiao Xiaogang, from the collection of Guy and Miriam Ullens, also failed to sell.

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