Christie's is auctioning off a bunch of documents related to the
history of computing.
A '46 IAS report by von Neumann and others to the US Army on the
concept of a computer is expected to go for around $35k, an original
copy of Turing's "On computable numbers" for about $17.5k, a letter
from Gödel to Skolem for about $15k, Shannon's collected works for
about $10k, etc.
More from Anupam Gupta: Some related info
(including dates of exhibitions in Cambridge MA, and Palo Alto) and also on Boing Boing.