Rare Book Monthly

Articles - April - 2014 Issue

How to Get Current Price Estimates from Older Auction Records

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Actual prices and current estimates for the ultra-expensive first edition of Audubon's Birds of America (click to enlarge).

Here is a feature that will help subscribers to the AE Bibliographic Database (or future subscribers) get a better handle on values. The AE Database is a compilation of records, mostly priced auction lots, from the field of books and works on paper. It is now over 5 million records strong, and growing almost every day or two. It is unique.

 

When you do a search of the AED, you will see a button at the top left, just above the results, that reads “Get Current Estimate.” To get a current estimate, either check those records for which you seek one, or check the box at the top that will check them all. Then click the button. Your current estimates will appear. What, then, is a “current estimate?”

 

A “current estimate” is a guideline for what older auction prices represent in value in today's dollars. It is not just an indexing for inflation, adjusting yesterday's prices based on the consumer price index or the price of milk. Instead, it adjusts old prices based on the rate of inflation (or deflation) in the price of books over time. That is where the 5 million database records come in. They have been used to compute median prices for years as far back as 1914. That has enabled us to calculate something of a consumer price index for books, rather than groceries or housing or some other unrelated commodity.

 

Now this is going to be an estimate, as perfection is not possible. It will take an old price and calculate an estimate based on the appreciation of a typical book, but not all books are equal. Just as all elements of the consumer price index have not appreciated at equal amounts, so have books appreciated at different rates. In general, the old adage that “the rich get richer” is true of books too. The most valuable books generally appreciate more than average. Books by authors once in greater favor than they are today may appreciate more slowly, if at all. If more recent auction prices are higher than estimates for older ones, that is a sign of above average appreciation. That book may also be an above average investment going forward. One where recent sales are below estimates from older sales may indicate a book losing favor. You may want to be more cautious in what you pay for a book in this category than one appreciating faster than average.

 

The Get Current Estimate feature also translates prices in other currencies to U.S. dollars so all records can be compared. Conversions are made using exchange rates at the time of sale (not current exchange rates) for accuracy in estimates.

 

Here are two more numbers you will see when you get a current estimate:

 

1. Average Current Estimate. This computes the average current estimate of all the records you have selected. For this to provide a reasonable estimate, you need to make sure you have only selected apples, not oranges. In other words, if you get the estimate for a particular title, but it includes a mix of first and later editions, some signed copies, etc., though each individual estimate will be reasonable, averaging them together will not. You need to select only comparable copies and eliminate the rest to get a solid average estimate.

 

2. Probability of Reappearance. Here is another useful feature, but as with average current estimate above, you need to select only comparable records. This formula looks at how often the book has shown up at auction in the past and computes roughly how often it can be expected to show up in the future. The formula is weighted to more recent results as books which may have shown up frequently a half or even a century ago may have mostly disappeared from the market today. This can be very helpful in determining whether to buy a copy of a book. If it appears at auction every year or two, or maybe multiple times per year, there is little need to chase a copy that is more than fully priced. If it is a book you seriously want, but it appears rarely on the market, perhaps only once every five, ten or more years, you may want to be more aggressive in your pursuit of a copy now being offered. You may have to wait a long time for another chance.

 

Those of you who are already using this feature may have noticed current estimates rose recently. The median price of books rose 7% last year, so older prices have had their current estimates raised by this amount to reflect the recent upward trend in prices. However, they have not yet caught up with prices prior to the recession of 2008. You will still find current estimates lower than actual prices paid during the years 2004-2007, with the largest drop being from prices in 2007, the year before the big recession.

Rare Book Monthly

  • <b>Swann Auction Galleries, Mar 7:</b> Miguel de Cervantes Saavedra, <i>El Ingenioso Hildalgo Don Quixote de la Mancha . . . Nueva Edición,</i> first Ibarra edition, Madrid, 1780. $8,000 to $12,000.
    <b>Swann Auction Galleries, Mar 7:</b> Illuminated Prayer Book in Latin and French, France, 1530-40s. $20,000 to $30,000.
    <b>Swann Auction Galleries, Mar 7:</b> Illuminated Book of Hours in Latin, France, mid-15th century. $15,000 to $20,000.
    <b>Swann Auction Galleries, Mar 7:</b><br><i>Die Ernsthaffte Christenpflicht,</i> earliest known edition of the first complete Mennonite prayer book, 1708. $300 to $500.
    <b>Swann Auction Galleries, Mar 7:</b> Georg Agricola, <i>De ortu & causis subterraneorum Lib V.,</i> first edition, Basel, 1546. $6,000 to $9,000.
    <b>Swann Auction Galleries, Mar 7:</b> Frederick Ruysch, <i>Icon durae matris in concava [convexa] superficie visae,</i> with 2 mezzotints by Jan Ladmiral, first edition, Amsterdam, 1737. $4,000 to $6,000.
    <b>Swann Auction Galleries, Mar 7:</b> Wilhelm Conrad Röntgen, <i>Eine Neue Art von Strahlen,</i> Würzburg, 1895. $3,000 to $5,000.
    <b>Swann Auction Galleries, Mar 7:</b> Pietro Carrera, <i>Il Gioco de gli Scacchi,</i> first edition, Militello, 1617. $4,000 to $6,000.
    <b>Swann Auction Galleries, Mar 7:</b> William Lithgow, <i>The Totall Discourse, of the Rare Adventures</i> [etc.], London, 1632. $2,000 to $3,000.
    <b>Swann Auction Galleries, Mar 7:</b> Michel de Nostradamus, <i>The True Prophecies or Prognostications,</i> first complete edition in English, London, 1672. $2,500 to $3,500.
    <b>Swann Auction Galleries, Mar 7:</b> Pseudo-Methodius, <i>De revelatione facta . . . beato Methodio,</i> Basel, 1504. $2,500 to $3,500.
    <b>Swann Auction Galleries, Mar 7:</b> Hrabanus Maurus, <i>De laudibus sancte crucis opus,</i> Pforzheim, 1503. $1,000 to $2,000.
  • <b>Chiswick Auctions: Autographs & Memorabilia. February 28, 2019</b>
    <b>Chiswick Auctions, Feb 28:</b> Autograph album featuring signatures by prominent actors, politicians, musicians and authors, including Rudolph Valentino. £1,000 to £1,500
    <b>Chiswick Auctions, Feb 28:</b> An extremely rare working radio script for Crazy People No 29, the first series of <i>The Goon Show.</i> £600 to £800
    <b>Chiswick Auctions, Feb 28:</b> Manuscript prayer book, in German. 8vo, 1755 £800 to £1,200
    <b>Chiswick Auctions, Feb 28:</b> Italian Manuscript on Geometry, with diagrams, 18th century. £500 to £700
    <b>Chiswick Auctions: Ornithology, Zoology & Voyages. February 27, 2019</b>
    <b>Chiswick Auctions, Feb 27:</b> Thorburn (Archibald). Sparrowhawk, original watercolour & gouache, signed & dated lower right, 1917. £1,500 to £2,000
    <b>Chiswick Auctions, Feb 27:</b> Burton (Sir Richard Francis). <i>Personal Narrative of a Pilgrimage to El-Medinah and Meccah.</i> 3 vol., FIRST EDITION, 1855-56. £1,000 to £1,500
    <b>Chiswick Auctions, Feb 27:</b> [Mount (Richard) & Page (Thomas)]. <i>The English Pilot. Describing the Sea-Coasts…</i> 31 engraved maps, W. & J. Mount, T. Page, 1756 £4000 to £6000
    <b>Chiswick Auctions: Ornithology, Zoology & Voyages. February 27, 2019</b>
    <b>Chiswick Auctions, Feb 27:</b> D’apres De Mannevillette (Jean-Baptiste Nicolas Denis). <i>Le Neptune Oriental.</i> Paris & Brest, [1775 – 1781]. £10,000 to £15,000
    <b>Chiswick Auctions, Feb 27:</b> Loring (Josiah). Terrestrial Globe Containing all the Late Discoveries and Geographical Improvements. Boston, Gilman Joslin, 1846, £800 to £1,200
    <b>Chiswick Auctions, Feb 27:</b> Shelley (G. E., Capt.). <i>A Monograph of the Nectariniidae, or Family of Sun-birds,</i> FIRST EDITION, by the Author, 1876-80. £4,000 to £6,000
  • <b>Bonhams: Treasures from the Eric C. Caren Collection: How History Unfolds on Paper, Part VII (Online). March 6-14, 2019</b>
    <b>Bonhams, Mar 6-14:</b> Albert Einstein A remarkable letter on God in English, one of his most eloquent and quoted, 1 p, July 2, 1945. $100,000 to $150,000.
    <b>Bonhams, Mar 6-14:</b> Benjamin Lincoln's commission as Major General in the Continental Army, February 19th, 1777. $60,000 to $90,000.
    <b>Bonhams, Mar 6-14:</b> Broadside. A Poem Upon the Bloody Engagement That Was Fought on Bunker's-Hill. 1775. $15,000 to $25,000.
    <b>Bonhams, Mar 6-14:</b> Early, full printing of the Star-Spangled Banner in The Yankee, October 7, 1814. $8,000 to $12,000.
    <b>Bonhams, Mar 6-14:</b> Paul Revere. Engraving, “The Boston Massacre Perpetrated on March 5, 1770," in <i>Massachusett's Calendar 1772.</i> $8,000 to $12,000.
    <b>Bonhams: Treasures from the Eric C. Caren Collection: How History Unfolds on Paper, Part VII (Online). March 6-14, 2019</b>
    <b>Bonhams, Mar 6-14:</b> Earliest known newspaper coverage of Babe Ruth, "a St Mary's schoolboy," Baltimore, April 4, 1914. $6,000 to $9,000
    <b>Bonhams, Mar 6-14:</b> Franklin, Benjamin. <i>The Independent Whig.</i> First Magazine Published in America, Philadelphia: Keimer, 1723-4. $15,000 to $20,000
    <b>Bonhams, Mar 6-14:</b> Smith, Joseph. <i>The Book of Mormon.</i> Palmyra: Printed by E.B. Grandin for the Author, 1830. First printing. $40,000 to $60,000
    <b>Bonhams, Mar 6-14:</b> Last Words of Joseph Smith. Autograph Letter Signed from a Mormon disciple, conveying a contemporary account of the Prophet's final words, Nauvoo, July 27, 1844. $10,000 to $15,000
    <b>Bonhams, Mar 6-14:</b> John Brown's Body. Autograph Letter Signed from the daughter of John Brown attempting to arrange the return of her father's body, North Elba, Essex Co, NY, November 29, 1859. $4,000 to $6,000
    <b>Bonhams, Mar 6-14:</b> Powell Expedition. Autograph diary of Rhodes C. Allen kept during the Powell Expedition of 1868, June 29, 1868 - November 16, 1868. $20,000 to $40,000
  • <b>Bonhams, Mar 12:</b> Walt Whitman. <i>Leaves of Grass.</i> First edition, first issue, SIGNED in block letters by Whitman. 1855. $200,000 to $300,000
    <b>Bonhams, Mar 12:</b> Isaac Newton's copy of John Greave's <i>Pyramidographia,</i> London, 1646. $50,000 to $70,000
    <b>Bonhams, Mar 12:</b> Colonel John Mosby. Robert E. Lee's autograph letter to Samuel Cooper reporting on Mosby's exploits, with Cooper's autograph note ordering his appointment to Major.
    <b>Bonhams, Mar 12:</b> Gyula Halasz Brassai. Large archive of autograph and typed letters, over 260, to his family including his wife Gilberte, 1947-1978. $40,000 to $60,000
    <b>Bonhams, Mar 12:</b> Archive of drawings and letters from Harper Lee to Charles Carruth, including an inscribed first edition of <i>To Kill a Mockingbird.</i> $20,000 to $30,000
    <b>Bonhams, Mar 11:</b> VESALIUS, ANDREAS. 1514-1564. <i>De humani corporis fabrica libri septem.</i> Basel: Johannes Oporinus, June 1543. $300,000 to $500,000
    <b>Bonhams, Mar 11:</b> HARVEY, WILLIAM. 1578-1657. <i>De motu cordis & sanguinis in animalibus Anatomica Exercitatio.</i> Leiden: Joannis Maire, 1639. $25,000 to $35,000
    <b>Bonhams, Mar 11:</b> BERENGARIO DA CARPI, GIACOMO. 1460-1530. <i>Isagogae breves perlucide ac uberrimae in Anatomiam humani corporis.</i> Bologna: Benedictus Hectoris, 15 July 1523. $15,000 to $25,000
    <b>Bonhams NY, Mar 11:</b> FRANKLIN, BENJAMIN. 1706-1790. <i>Experiments and Observations on Electricity, made at Philadelphia in America…</i> London, 1769. $10,000 to $15,000
    <b>Bonhams NY, Mar 11:</b> BENIVIENI, ANTONIO. 1443-1502. <i>De abditis nonnullis ac mirandis morborum et sanationum causis.</i>Florence: Filippo Giunta, 1507. $8,000 to $12,000

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