The service said the General Services Administration is handling the online auction, which runs through June 2, and items being sold include personal documents, typewriters, academic transcripts and "more than 20,000 pages of written documents, including the original handwritten and typewritten versions" of Kaczynski's manifesto, CNN reported Wednesday.
Kaczynski, 68, is serving a life sentence in a Colorado prison for killing three people and wounding 23 in a string of bombings from 1978 to 1995.
The auction is aimed at raising a portion of the $15 million restitution owed to four of his victims. The auction plan was approved by the 9th U.S. Circuit Court of Appeals in 2009.