Expected to be the highlight of Sotheby’s sale in New York, Swiss artist Alberto Giacometti's 1955 bust Grande tête mince (Grande tête de Diego) failed to find a buyer last week. One prominent reason for this failure was likely the bronze head’s estimate — a whopping $70 million. In contrast to the 2015 auction record of $141.3 million for Giacometti’s 1947 sculpture Pointing Man, the $70 million figure proved too intimidating. The auction market disappointment came mere days after a $30 million Andy Warhol painting was withdrawn from a Christie’s sale when the consignor, who had put the work on auction, arguably realised it might not meet its asking price. These setbacks are seen as a sign of a struggling market, one that may require a reassessment of pricing expectations and collector sentiment. What are auction houses? An auction house essentially serves as an intermediary between sellers and buyers, receiving commissions from both. They may task a team to source and screen artworks based on market demand. “Every auction is curated based on the different arts we want to feature, modern or contemporary,” Manoj Mansukhani, Chief Marketing Officer, AstaGuru Auction House, told The Indian Express. “We need to create a mix that appeals to both seasoned collectors and new buyers. A few months are also dedicated to prepare the catalogue.” When is an artwork put up for auction? “Historically, the primary reasons that prompt individuals to consign artworks to auction are the three D’s: debt, death, and divorce”, according to the Sotheby’s Institute of Art. “However, other factors such as a shift in personal taste or the need to downsize may also influence the decision to sell.” An auction house may be alerted about the existence of a rare or high-value artwork and subsequently collaborate with the owner to facilitate its sale. Christie’s, for instance, remained in touch with Oslo University Hospital for over 13 years before it put MF Husain’s 1954 canvas Untitled (Gram Yatra) on sale at an auction in New York in March 2025. This evocative homage to rural and pastoral life in India achieved a remarkable $13.7 million (approximately ₹118 crore), setting a new benchmark as the most expensive work of Indian art ever sold at an auction. How is the value of an artwork determined? The value of an artwork is estimated once it is verified and its provenance and authenticity are checked. Before a lot (comprising an item or a collection of items) is put up for auction, it is assigned a low and high estimate, providing a range of the expected value it could achieve. The auction catalogues reflect these estimates alongside the details of the artwork. The lower estimate typically serves as the reserve price, the minimum a seller will accept for the artwork, and below which a sale will not be made. The Husain mural sold at nearly four times its higher estimate of $3.5 million. What happens if the work fails to find bidders? If there are no bids for a lot, or if the bidding does not reach the reserve price, the lot is bought in, meaning it remains unsold. Unsold artworks are usually returned to the consignor, who could ask the auction house to offer the artwork for auction again. This may be done after a delay, since the unsold work is considered burned, making it more difficult to find a buyer immediately at a similar price. A different scenario emerges if the artwork has a guarantee, done to ensure that it secures a pre-decided minimum price on its sale. This is practised occasionally for high-value or significant works that come up for auction. A guarantee may be offered by the auction house itself, in what is called a house guarantee. Alternately, it may be provided through an external undertaking, through a collector, gallery, or art dealer known as a third-party guarantee. The Giacometti sculpture, put on sale from the estate of real estate magnate Sheldon H Solow, who died in 2020, came to the auction without a minimum guarantee.