Rare Book Monthly

Articles - October - 2007 Issue

The Declining Value of Inventory

Nothing remains the same.

Nothing remains the same.


By Bruce McKinney

In the biblical story of Noah and the ark the emphasis is always placed on the miracle of survival. A male and female of each animal are marched up into the boat to float for forty days [and nights] and to repopulate the earth once the flood has passed. No reference in the story is made to how anyone or anything feels about being left off the boat. Well, these days, in the book business, the ark is being loaded and inevitably Noah is always deciding he still has too much. In the meantime the water is rising. At least that's the way it is in the world of collectible books. For many booksellers there is no room in the ark.

Recently I spoke with a dealer who has hundreds of thousands of items online. He uses triage software to price his material a penny or two cheaper than other listings of the same item. In this way he has shifted from self-determined to market determined pricing. It makes sense if selling books is the absolute goal. The market decides.

Selling collectible and used books are of course not the same thing. Neither is the dividing line between them fixed. It is relentlessly shifting and the shift has been negative because material is flowing onto the net in record numbers and its turning out that what often used to be considered unobtainable is now available in multiple copies.

The math is easy. Here is a balanced market.

Copies
--------------- = 1
Collectors


When there are more collectors than copies the value of copies is firm and rising. When the number of copies is greater than collectors the value is weak and falling.

Today there is a relentless flow of fresh material into the market and a sense that there is probably much more to come. This translates into a weak market:

3 or more Copies
------------------ = 3
1 Collector


In a strong market it looks like this

1 copy every 2 to 5 years
--------------------------------- = > 1
Multiple Collectors

The anecdotal evidence suggests that for an increasingly large population of titles and editions the number of copies online is always increasing while the number of buyers for them at a minimum is not increasing as fast. Many believe the number of collectors is falling. I doubt that but understand it can feel that way. It's almost certain that collectors and collecting passion are not keeping pace with the tsunami of material flooding the market. The question is whether this is an aberration or evidence of a fundamental change in collecting interest. In other words, is it a recession or depression?

To me the market looks unstable but healthy. Material is flowing to market on listings sites, in shops, at shows, on line, at auction and eBay. And what used to be difficult to see is now hard to miss. There are lots and lots of copies. They have been around but have never been so visible.

Efficient markets adjust price to compensate for over-supply and books are no exception. The trick today is to understand importance, availability and appropriate price and not to over-charge if you are a dealer and not to over-pay if you are a collector.

This will turn out to be the most exciting time in the collecting of books, manuscripts, and ephemera in the past 500 years. It will some day have a name and both buyers and sellers will reminisce about how difficult it was. In the meantime we have to get through it. Both buyers and sellers are adjusting to a world pregnant with information. The revolution is underway, the way forward a thin light in a tunnel that some believe is a train bearing down but which I personally believe is a new world at hand.

Rare Book Monthly

  • Swann
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    Swann, Dec. 9: Lot 156: Cornelis de Jode, Americae pars Borealis, double-page engraved map of North America, Antwerp, 1593.
    Swann, Dec. 9: Lot 206: John and Alexander Walker, Map of the United States, London and Liverpool, 1827.
    Swann, Dec. 9: Lot 223: Abraham Ortelius, Typus Orbis Terrarum, hand-colored double-page engraved world map, Antwerp, 1575.
    Swann
    Maps & Atlases, Natural History & Color Plate Books
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    Swann, Dec. 9: Lot 233: Aaron Arrowsmith, Chart of the World, oversize engraved map on 8 sheets, London, 1790 (circa 1800).
    Swann, Dec. 9: Lot 239: Fielding Lucas, A General Atlas, 81 engraved maps and diagrams, Baltimore, 1823.
    Swann, Dec. 9: Lot 240: Anthony Finley, A New American Atlas, 15 maps engraved by james hamilton young on 14 double-page sheets, Philadelphia, 1826.
    Swann
    Maps & Atlases, Natural History & Color Plate Books
    December 9, 2025
    Swann, Dec. 9: Lot 263: John Bachmann, Panorama of the Seat of War, portfolio of 4 double-page chromolithographed panoramic maps, New York, 1861.
    Swann, Dec. 9: Lot 265: Sebastian Münster, Cosmographei, Basel: Sebastian Henricpetri, 1558.
    Swann, Dec. 9: Lot 271: Abraham Ortelius, Epitome Theatri Orteliani, Antwerp: Johann Baptist Vrients, 1601.
    Swann
    Maps & Atlases, Natural History & Color Plate Books
    December 9, 2025
    Swann, Dec. 9: Lot 283: Joris van Spilbergen, Speculum Orientalis Occidentalisque Indiae, Leiden: Nicolaus van Geelkercken for Jodocus Hondius, 1619.
    Swann, Dec. 9: Lot 285: Levinus Hulsius, Achtzehender Theil der Newen Welt, 14 engraved folding maps, Frankfurt: Johann Frederick Weiss, 1623.
    Swann, Dec. 9: Lot 341: John James Audubon, Carolina Parrot, Plate 26, London, 1827.
  • Sotheby’s
    Book Week
    December 9-17, 2025
    Sotheby’s, Dec. 11: Darwin and Wallace. On the Tendency of Species to form Varieties..., [in:] Journal of the Proceedings of the Linnean Society, Vol. III, No. 9., 1858, Darwin announces the theory of natural selection. £100,000 to £150,000.
    Sotheby’s, Dec. 11: J.K. Rowling. Harry Potter and the Philosopher's Stone, 1997, first edition, hardback issue, inscribed by the author pre-publication. £100,000 to £150,000.
    Sotheby’s, Dec. 11: Wolfgang Amadeus Mozart. Autograph sketchleaf including a probable draft for the E flat Piano Quartet, K.493, 1786. £150,000 to £200,000.
    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.
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