Sometimes a picture is worth a thousand words. We recently updated the monthly Trends in Book Auction Prices graphs and the pictures emerging are encouraging. Median lot prices that peaked in December 2007 at $488 appear to have bottomed in March 2010 at $368 and may now be slowly building support just above $370. Three months of showing increasing support suggests the drop, which was horrific, may be over. By the end of the year we'll know one way or the other.
The second graph, "Year to Year Change in 12 Month Moving Average" tells the same story in a much more dramatic way. It looks at the change in median lot price as deviation from a norm since June, 2006. Over the past four years we have experienced a sustained run-up from October 2006 to the peak in October 2007 followed by a prolonged decline that first bottomed in June 2009 and has now, a year later, built a credible pattern of recovery from a much lower base.
The most troubling graph, "12 Month Moving Average of Sell Through Rate," suggests that consignors are not fully reconciled to the lower market and are registering their protests with reserves that bidders do not feel are justified. For the auction market to be healthy the percentage of lots sold needs to be consistently above 70% and probably closer to the norms of the past decade: 74-75%. Earlier this spring we flirted with the high sixties and even now we're a fraction under 70%. This number is very important.
Because these graphs are based on the tens of thousands of lots a month and the more than 200,000 lots posted each year rather than on the performance of single lots every buyer, seller and auction house can legitimately elect to see their lots, their purchases, and their entire auctions as exceptions to the rule. But overall, almost no lots have been exempted from the crushing adjustment we have and are continuing to live through.
One other statistic, introduced this spring but not yet graphed in this series until we have a full year of data, provides insight into the inner workings of entire auctions. We now correlate total sales to the total high estimates of all lots whether they sold or not. Individually, these comparisons don't tell much. Seen as part of a pattern of results they provide significant insight into the pricing strategies each auction house employs. For bidders, this is useful.
Bonhams, Dec. 8-18: Autograph Letter Signed ("Martinus Luther") to His Friend the Theologian Gerhard Wiskamp ("Gerardo Xantho Lampadario"). $100,000 - $150,000.
Bonhams, Dec. 8-18: An Exceptionally Fine Copy of Austenís Emma: A Novel in Three Volumes. $40,000 - $60,000.
Bonhams, Dec. 8-18: Presentation Copy of Ernest Hemmingwayís A Farewell to Arms for Edward Titus of the Black Mankin Press. $30,000 - $50,000.
Bonhams, Dec. 8-18: Autograph Manuscript Signed Integrally for "The Songs of Pooh," by Alan Alexander. $30,000 - $50,000.
Bonhams, Dec. 8-18: Autograph Manuscript of "Three Fragments from Gˆtterd‰mmerung" by Richard Wagner. $30,000 - $50,000.
Bonhams, Dec. 8-18: Original Preliminary Artwork, for the First Edition of Snow Crash. $20,000 - $30,000.
Bonhams, Dec. 8-18: Autograph Letter Signed ("T.R. Malthus") to Economist Nassau Senior on Wealth, Labor and Adam Smith. $20,000 - $30,000.
Bonhams, Dec. 8-18: History of the Peloponnesian War by Thucydides Finely Bound by Michael Wilcox. $20,000 - $30,000.
Bonhams, Dec. 8-18: First Edition of Lewis and Clark: Travels to the Source of the Missouri River and Across the American Continent to the Pacific Ocean. $8,000 - $12,000.
Bonhams, Dec. 8-18: Original Artwork for the First Edition of Neal Stephenson's Groundbreaking Novel Snow Crash. $100,000 - $150,000.
Bonhams, Dec. 8-18: A Complete Set Signed Deluxe Editions of King's The Dark Tower Series by Stephen King. $8,000 - $12,000.
Bonhams, Dec. 8-18: Autograph Letter Signed ("John Adams") to James Le Ray de Chaumont During the Crucial Years of the Revolutionary War. $8,000 - $12,000.
Sotheby’s Book Week December 9-17, 2025
Sotheby’s, Dec. 12: Hooke, Robert. Micrographia: or some Physiological Descriptions of Minute Bodies made by Magnifying Glasses. London: James Allestry for the Royal Society, 1667. $12,000 to $15,000.
Sotheby’s, Dec. 12: Chappuzeau, Samuel. The history of jewels, first edition in English. London: T.N. for Hobart Kemp, 1671. $12,000 to $18,000.
Sotheby’s, Dec. 12: Sowerby, James. Exotic Mineralogy, containing his most realistic mineral depictions, London: Benjamin Meredith, 1811, Arding and Merrett, 1817. $5,000 to $7,000.
Heritage Auctions Rare Books Signature Auction December 15, 2025
Heritage, Dec. 15: John Donne. Poems, By J. D. With Elegies on the Author's Death. London: M[iles]. F[lesher]. for John Marriot, 1633.
Heritage, Dec. 15: Edgar Rice Burroughs. Tarzan of the Apes.
Heritage, Dec. 15: F. Scott Fitzgerald. Tender is the Night. A Romance.
Heritage, Dec. 15: Jerry Thomas. How to Mix Drinks, or the Bon-Vivant's Companion, Containing Clear and Reliable Directions for Mixing All the Beverages Used in the United States…