Chorley's bi-annual auction of Fine Books, Maps and Manuscripts includes a wide variety of works including a page from the Gutenberg bible.
[Caxton] Higden (Ranulphus) [Polychronicon] single leaf from the Liber Ultimus
Two leaves from a portable Antiphonal [Iberian peninsula (probably Spain, second half 12th Century]
Boswell (James) The Yale Editions of the Private Papers of James Boswell