Rare Book Monthly
Book Valuation Gets a Place at the Table
Old books, like old money, need to be translated into today's values
Today there are numerous ways to know what the asking prices of books are and as Mike Stillman has correctly pointed out these are the prices of all the books that have not sold. What we show you are almost a million records of books, manuscripts and ephemera that have sold and we adjust the prices to current value. Now, for the first time, you can obtain a reasonably good idea of what your book is worth using a systematic process that identifies appropriate records, adjusts them to current value and averages them to provide you with a single valuation. Stray and inconsistent records are easily checked and eliminated if inappropriate.
Ultimately a seller may not agree to sell at the historically derived value but there is simply no reason not to know what the market history is. If you don't want to know it before you buy you will in any event learn all about it when you decide to sell. It's called reality. You may well have to pay more to buy material than these projected valuations suggest but you will also feel empowered to buy when the offers are well below what history suggests the real value is. Most booksellers want to sell their books. Some become argumentative if you discuss price but most will listen to an offer. If, in a reasonable amount of time, they believe they'll sell their book for their price they aren't going to discuss any concessions. If not, they will prefer to negotiate rather than lose the chance to sell their book to a knowledgeable buyer. This software helps both buyers and sellers to find the middle ground.
The development of this project has been undertaken by Mike Stillman, evaluated by Jenny McKinney who has already proposed a second version we'll begin work on this summer and implemented by Wei-cheng Chu, our software engineer. It is an important step in the evolution of bookselling on the net.
If you would like to sign up for a week or a month to give this software a work out click here and we'll take you to the sign-up page. A one week sign up is $7.95, a month $14.75, a year $141.60. For years the book business has been all about "asking prices." This is a step toward building the "bid side."
Rare Book Monthly
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Sotheby’s
Shelf Life: Books, Manuscripts and Works on Paper from the Library of Stanley J. Seeger and Christopher Cone
25 June – July 7Sotheby’s, July 7: Ludwig van Beethoven. Autograph sketches for the overture "Die Weihe des Hauses", op.124, [1822], UNPUBLISHED. £150,000 to £200,000.Sotheby’s, July 7: Jane Austen. Pride and Prejudice, 1813, first edition, 3 volumes, contemporary half calf. £50,000 to £70,000.Sotheby’s, July 7: Walt Whitman. Leaves of Grass, Brooklyn, 1855, first edition, first issue, original green cloth, the Doheny copy. £50,000 to £70,000.Sotheby’s, July 7: Binding—Sangorski & Sutcliffe—Omar Khayyam. Rubaiyat, London, 1872, third edition, in a magnificent jewelled Peacock binding. £15,000 to £20,000.Sotheby’s, July 7: George Eliot. Middlemarch, Edinburgh and London, 1871, first edition in the original parts. £20,000 to £30,000. -
Forum Auctions
The Private Library:
Fine Printing & Private Press books, the collection of the late David Chambers
July 9, 2026Forum, July 9: Hassall (Joan) A large collection of over 300 original woodblocks of engravings for various books, v.d., with Hassall's engraver's glass water-globe (Qty) - Est. £10,000-15,000Forum, July 9: Eragny Press.- [Bradley (Katherine Harris) & Edith Emma Cooper], "Michael Field." Whym Chow, Flame of Love, one of only 27 copies, inscribed by Bradley, the rarest book from the press, 1914. - Est. £3,000-4,000Forum, July 9: [Moore (Thomas Sturge)] [Wood Engravings], 71 wood-engravings printed by David Chambers from the original blocks, the only set on Japanese Hosho paper, from an edition of 5 sets, [1970]. - Est. £3,000-4,000Forum Auctions
The Private Library:
Fine Printing & Private Press books, the collection of the late David Chambers
July 9, 2026Forum, July 9: La Fontaine (Jean de) Contes et Nouvelles en vers, 2 vol., engraved plates after Eisen, fine early 19th century blue morocco, gilt, by Bradel l'ainé, Amsterdam [Paris], 1762. - Est. £2,000-3,000Forum, July 9: Erotica.- Prostitution.- Pretty Women of Paris (The); Their Names and Addresses, Qualities and Faults..., [Paris], privately printed at the Press of the Prefecture de Police, 1883. - Est. £3,000-4,000Forum, July 9: Vale Press.- Ricketts (Charles) & Lucien Pissarro. De la Typographie et de l'Harmonie de la Page Imprimée…, [one of 216 copies], bound in dark blue morocco tooled in gilt, by Sarah T.Prideaux, 1898. - Est. £1,000-1,500Forum Auctions
The Private Library:
Fine Printing & Private Press books, the collection of the late David Chambers
July 9, 2026Forum, July 9: Martin (John) Illustrations of the Bible, complete set of 20 mezzotints, good impressions, rarely found in early states, [c.1831-1835]. - Est. £1,000-1,500Forum, July 9: Golden Cockerel Press.- Four Gospels of the Lord Jesus Christ (The), one of 500 copies, Mary Gill's copy, Waltham St. Lawrence, 1931 with a signed proof of engraving on japon numbered 10/10 (2) - Est. £5,000-7,000Forum, July 9: Boccaccio (Giovanni) The Decameron, 3 vol., vol.1 extra-illustrated by John Buckland Wright with c.150 erotic original drawings in pen & ink and pencil, 1886 [extra-illustrated c.1940]. - Est. £10,000-15,000Forum Auctions
The Private Library:
Fine Printing & Private Press books, the collection of the late David Chambers
July 9, 2026Forum, July 9: Cox (Morris) Collection of Gogmagog Press Books, 35 vol., rare complete collection of printed books issued by the press, limited editions, most signed by Cox, 1957-83. - Est. £10,000-15,000Forum, July 9: Wynkyn de Worde.- [Terentius Afer (Publius)] [Comedie...], [Paris, Josse Badius: sold in London by Wynkyn de Worde, & others], [15 July 1504]. - Est. £4,000-6,000Forum, July 9: Mosley (James) Ornamented Types. Twenty-Three Alphabets from the Foundry of Louis John Pouchée, 2 vol., one of 10 copies for presentation, from an edition of 210, 1992-93. - Est. £1,000-2,000 -
Forum Auctions
The 10th Anniversary Sale
Fine Books, Manuscripts and Works on Paper
July 16, 2026Forum, July 16: Inundation papyrus. P.Michael 4, the ‘Inundation papyrus’, a geographical account of the Nile near Canopus, in Greek, remains of two columns from a manuscript scroll on papyrus, Egypt, second century CE. £12,000-18,000Forum, July 16: Book of Hours, use of Sarum, manuscript on vellum, 6 full-page miniatures, with famous Middle English inscriptions, Southern Netherlands for the English market, [c.1430]. £30,000-50,000Forum, July 16: Qu'ran, Arabic manuscript on burnished, stencilled, and gold-flecked paper, 447ff., Sultanate Gujarat, Ahmadabad, [after 1411 but no later than 1442]. £15,000-20,000Forum Auctions
The 10th Anniversary Sale
Fine Books, Manuscripts and Works on Paper
July 16, 2026Forum, July 16: Turner (William). A New boke of the natures and properties of all wines that are commonly vsed here in England, rare first edition of the first English book on wine, By William Seres, 1568. £20,000-£30,000Forum, July 16: Spenser (Edmund). The Faerie Queene. first edition, Printed [by John Wolfe] for William Ponsonbie, 1590. £30,000-40,000Forum, July 16: Shakespeare (William). The Comedie of Errors, extracted from the first folio, Isaac Jaggard and Edward Blount, 1623. £15,000-20,000Forum Auctions
The 10th Anniversary Sale
Fine Books, Manuscripts and Works on Paper
July 16, 2026Forum, July 16: Fleming (Ian). Casino Royale, first edition, signed presentation inscription from the author, 1953. £40,000-60,000Forum, July 16: d'Agoty (Jacques-Fabien Gautier). Anatomie de la Tête, first edition, Paris, chez le Sieur Gautier, 1748. £10,000-15,000Forum, July 16: Martial Arts.- Lee (Bruce). 'Praying Mantis style' Kung Fu book, containing numerous annotations, diagrams and graphs in Bruce Lee's hand, c. 1960. £50,000-70,000Forum Auctions
The 10th Anniversary Sale
Fine Books, Manuscripts and Works on Paper
July 16, 2026Forum, July 16: Warre (Capt. Henry James). Sketches in North America and the Oregon Territory, first edition, rare hand-coloured issue, 1848. £30,000-40,000Forum, July 16: Norie (John William). The Marine Atlas, or Seaman's Complete Pilot for all the principal places in the known world..., 1826. £30,000-50,000Forum, July 16: Mao Tse-tung.- Kim Il-sung.-[Note book for visitors from China to Korea], signed by Mao and Kim, [Beijing, 1954]. £10,000-15,000