U.S. District Judge Garland Burrell Jr. ruled Thursday that items belonging to Kaczynski — including books, tools, clothing and two checkbooks — should be sold at a "reasonably advertised Internet auction."
The auction will not include 100 items the government considers to be bomb-making materials, such as writings that contain diagrams and "recipes" for bombs.
U.S. Marshals Service will contract the sale with an Internet auctioneer who will bear the cost and receive no more than 10 percent of the proceeds.
The remaining revenues from the sale will be applied to the $15 million in restitution that Burrell ordered Kaczynski to pay his victims.
Kaczynski, 64, is serving a life sentence with no possibility of parole for a bombing spree that lasted from 1978 to 1995. The blasts from homemade bombs killed three people and injured 23.
Kaczynski was arrested at his cabin in Lincoln, Mont., in April 1996.