How one estimates the value of rare, even unique works is always a challenge. The correct formula is to determine the market price agreed upon by a willing buyer and willing seller, but the rarer the item, the harder that can be to determine. In the case of books, some are extremely rare, occasionally the only known copy. With manuscripts and ephemeral items, there often is only one of its kind.
If there is but one of a kind, there are generally two methods employed in valuing it. In the first, a skilled appraiser will search for known prices on comparable items, such as a similar document from the same person, or another person of comparable notoriety. Then there is the other method, whereby the estimator pulls some number out of thin air (or someplace else), often what the owner in his wildest dreams would like to obtain. If you have ever searched the listing sites or eBay, you will undoubtedly find some examples of each, even a few where the unknowing owner grossly underestimates the value (you won't see this as often as they don't last long).
This takes us to one of the more amusing cases we have seen lately, where the item was a piece of original art, but the principles are the same. The Abilene (Texas) Police Department recently issued the following report:
"A 60 year old Lubbock man who was passing through Abilene on his way to the Metroplex [i.e. Dallas-Forth Worth] alleges someone came into his motel room over the weekend and stole over $2 mil. in paintings, some clothing and a map. Ricky Denzler had rented a room at a motel located at 3417 South 1st in order to visit family. At some point over the weekend Denzler says someone came into his room and stole the 5 paintings, the clothing and a map.
"Denzler says he is the artist of the paintings and estimated their value at over $2 million dollars. Denzler did not provide any proof of the paintings. The Abilene Police Department is working this incident as a Burglary of a Habitation. The investigation continues."
There were five paintings, four of which Denzler estimated at $2,000, $2,500, $16,000 and $24,000. The fifth he estimated at over $2 million. It appears he used the latter of the two previous methods of estimating value mentioned earlier. Denzler is not a well-known artist. The only matches to his paintings that can be found in an internet search are those referring to this alleged theft. He is, perhaps, the next Michelangelo, but it does not appear that anyone else has recognized that yet. Only Mr. Denzler, who provided the police with the valuations, has so concluded as of this time. It is very unlikely he sought the advice of a licensed appraiser in reaching his estimates.
A few other details added to the suspicions. Mr. Denzler was staying in an older, inexpensive motel in a neighborhood of comparables. One usually doesn't leave a $2 million painting alone in the room of such a place. Press reports added further suspicion as the motel manager voiced suspicion based on the appearance of some of the people visiting Mr. Denzler. Abilene police later reported that they had received calls from Interpol and London when reports got out that a $2 million painting had been stolen in Abilene. Abilene police assured them that these were not the paintings they were seeking. They also indicated it was likely that they would close the case.
The message here is that for buyers and sellers, it is important to ascertain as closely as possible actual market valuations of collectibles. For buyers, it is imperative if one hopes to be able to sell the item at a future date without incurring a serious loss. For sellers, it is important if one hopes to actually sell their wares. Mr. Denzler may value his painting at $2 million, but he will never sell it until he determines what the fair market value is for his work. Safe to say, he needs to dramatically sharpen his paintbrush.
For lower priced items, listing sites such as AbeBooks, Biblio, and Amazon can provide some guidance, though these are only asking prices, not selling prices, and it is not clear how these asking prices are determined. One should look to the lower prices asked for guidance unless there is a discernible difference between those and the ones that are priced higher (condition, etc.). For more valuable books and works on paper, one should look for actual sales records, such as those available through the Rare Book Transaction History (subscription available on this website) or from a recognized appraiser. It is worth getting the numbers right.
Forum Auctions Fine Books, Manuscripts and Works on Paper 27th March 2025
Forum, Mar. 27: Dürer (Albrecht) Hierin sind begriffen vier bücher von menschlicher Proportion, 4 parts in 1, first edition, Nuremberg, Hieronymus Andreae for Agnes Dürer, 1528. £30,000 to £40,000.
Forum, Mar. 27: Book of Hours, Use of Rome, illuminated manuscript in Latin, on vellum, 26 fine hand-painted miniatures, 17th century dark brown morocco, [Lyon], [c. 1475 and later c. 1490-1500]. £25,000 to £35,000.
Forum, Mar. 27: Brontë (Emily) The North Wind, watercolour, [1842]. £15,000 to £20,000.
Forum, Mar. 27: Titanic.- Mudd (Thomas Cupper, one of the youngest victims of the sinking of the Titanic, 1895-1912) Autograph Letter signed on board RMS Titanic to his mother, April 11th 1912. £20,000 to £30,000.
Forum Auctions Fine Books, Manuscripts and Works on Paper 27th March 2025
Forum, Mar. 27: [Austen (Jane)] Emma: A Novel, 3 vol., first edition, for John Murray, 1816. £10,000 to £15,000.
Forum, Mar. 27: Picasso (Pablo).- Ovid. Les Metamorphoses, one of 95 copies, signed by the artist, Lausanne, Albert Skira, 1931. £10,000 to £15,000.
Forum, Mar. 27: America.- Ogilby (John) America: Being the Latest, and Most Accurate Description of the New World..., all maps with vibrant hand-colouring in outline, probably by an early hand, 1671. £15,000 to £25,000.
Forum, Mar. 27: Iceland.- Geological exploration.- Bright (Dr. Richard )and Edward Bird. Collection of twenty original drawings from travels in Iceland with Henry Holland and George Mackenzie, watercolours, [1810]. £20,000 to £30,000.
Forum Auctions The Library of Barry Humphries 26th March 2025
Forum, Mar. 26: Beckford (William) [Vathek] An Arabian Tale, first (but unauthorised) edition, Lady Caroline Lamb's copy with her signature and notes, 1786. £2,000 to £3,000.
Forum, Mar. 26: Baudelaire (Charles) Les Fleurs du Mal, first edition containing the 6 suppressed poems, first issue, contemporary half black morocco, Paris, 1857. £4,000 to £6,000.
Forum, Mar. 26: Beardsley (Aubrey).- Pope (Alexander) The Rape of the Lock, one of 25 copies on Japanese vellum, Leonard Smithers, 1896. £4,000 to £6,000.
Forum, Mar. 26: Douglas (Lord Alfred) Sonnets, first edition, the dedication copy, with signed presentation inscription from the author to his wife Olive Custance, The Academy, 1909. £2,000 to £3,000.
Forum Auctions The Library of Barry Humphries 26th March 2025
Forum, Mar. 26: Crowley (Aleister) The Works..., 3 vol. in 1 (as issued)"Essay Competition" issue on India paper, signed presentation inscription from the author, 1905-07. £1,500 to £2,000.
Forum, Mar. 26: Rodin (Auguste).- Mirbeau (Octave) Le Jardin des Supplices, one of 30 copies on chine with an additional suite, bound in dark purple goatskin, Paris, 1902. £3,000 to £4,000.
Forum, Mar. 26: Pellar (Hans) Eight original book illustrations for 'Der verliebte Flamingo' [together with] a published copy of the first edition of the book, 1923. £6,000 to £8,000.
Forum, Mar. 26: Cretté (Georges, binder).- Louÿs (Pierre) Les Aventures du Roi Pausole, 2 vol., one of 99 copies, with 2 original drawings, superbly bound in blue goatskin, gilt, Paris, 1930. £3,000 to £4,000.
Sotheby's Sell Your Fine Books & Manuscripts
Sotheby’s: The Shem Tov Bible, 1312 | A Masterpiece from the Golden Age of Spain. Sold: 6,960,000 USD
Sotheby’s: Ten Commandments Tablet, 300-800 CE | One of humanity's earliest and most enduring moral codes. Sold: 5,040,000 USD
Sotheby’s: William Blake | Songs of Innocence and of Experience. Sold: 4,320,000 USD
Sotheby’s: The Declaration of Independence | The Holt printing, the only copy in private hands. Sold: 3,360,000 USD
Sotheby's Sell Your Fine Books & Manuscripts
Sotheby’s: Thomas Taylor | The original cover art for Harry Potter and the Philosopher's Stone. Sold: 1,920,000 USD
Sotheby’s: Machiavelli | Il Principe, a previously unrecorded copy of the book where modern political thought began. Sold: 576,000 GBP
Sotheby’s: Leonardo da Vinci | Trattato della pittura, ca. 1639, a very fine pre-publication manuscript. Sold: 381,000 GBP
Sotheby’s: Henri Matisse | Jazz, Paris 1947, the complete portfolio. Sold: 312,000 EUR
Swann Printed & Manuscript African Americana March 20, 2025
Swann, Mar. 20: Lot 7: Thomas Fisher, The Negro's Memorial or Abolitionist's Catechism, London, 1825. $6,000 to $9,000.
Swann, Mar. 20: Lot 78: Victor H. Green, The Negro Travelers' Green Book, New York, 1958. $20,000 to $30,000.
Swann, Mar. 20: Lot 99: Rosa Parks, Hand-written recollection of her first meeting with Martin Luther King Jr., autograph manuscript, Detroit, c. 1990s. $30,000 to $40,000.
Swann, Mar. 20: Lot 154: Frederick Douglass, Autograph statement on voting rights, signed manuscript, 1866. $20,000 to $30,000.
Swann, Mar. 20: Lot 164: W.E.B. Du Bois, What the Negro Has Done for the United States and Texas, Washington, circa 1936. $3,000 to $4,000.
Swann Printed & Manuscript African Americana March 20, 2025
Swann, Mar. 20: Lot 263: Susan Paul, Memoir of James Jackson, Boston, 1835. $6,000 to $9,000.
Swann, Mar. 20: Lot 267: Langston Hughes, Gypsy Ballads, signed translation of García Lorca's poetry, Madrid, 1937. $1,500 to $2,500.
Swann, Mar. 20: Lot 274: Malcolm X, Collection from Alex Haley's estate, 38 items, 1963-1971. $4,000 to $6,000.
Swann, Mar. 20: Lot 367: Solomon Northup, Twelve Years a Slave, Auburn, NY, 1853. $2,500 to $3,500.
Swann, Mar. 20: Lot 402: Anna Julia Cooper, A Voice from the South, Xenia, OH, 1892. $2,000 to $3,000.
Koller, Mar. 26: Wit, Frederick de. Atlas. Amsterdam, de Wit, [1680]. CHF 20,000 to 30,000
Koller, Mar. 26: Merian, Maria Sibylla. Der Raupen wunderbare Verwandelung, und sonderbare Blumennahrung. Nürnberg, 1679; Frankfurt a. M. und Leipzig, 1683. CHF 20,000 to 30,000
Koller, Mar. 26: GOETHE, JOHANN WOLFGANG VON. Faust. Ein Fragment. Von Goethe. Ächte Ausgabe. Leipzig, G. J. Göschen, 1790. CHF 7,000 to 10,000
Koller, Mar. 26: Hieronymus. [Das hochwirdig leben der außerwoelten freünde gotes der heiligen altuaeter]. Augsburg, Johann Schönsperger d. Ä., 9. Juni 1497. CHF 40,000 to 60,000.
Koller, Mar. 26: BIBLIA GERMANICA - Neunte deutsche Bibel. Nürnberg, A. Koberger, 17. Feb. 1483. CHF 40,000 to 60,000
Koller, Mar. 26: HORAE B.M.V. - Stundenbuch. Lateinische Handschrift auf Pergament, Kalendarium französisch. Nordfrankreich (Rouen?). CHF 25,000 to 40,000