Los Angeles - A two-volume set of the Nazi manifesto Mein Kampf, signed by Adolf Hitler, sold at a Los Angeles auction Thursday for 64,850 dollars.
Prior to the sale, auctioneer Nate D Sanders had estimated the sale price at 20,000 to 25,000 dollars.
In a statement the auction house said 11 people had bid on the books, but the winning bidder was not identified.
The signed volumes were dedicated by Hitler to Josef Bauer, one of the first members of the Nazi Party, and one of the leaders of the Beer Hall Putsch in 1923, when a Hitler-led coup attempted to overthrow the Bavarian government.
Hitler likely gave them as Christmas gifts to Bauer in 1925 and 1926.Also selling in the online auction was a jacket owned by Albert Speer, Hitler's architect and the minister of armaments and war production for the Third Reich.
The jacket fetched 10,068 dollars. The coat which had Speer's name sewn in it, was seized by a US soldiers after the war. Speer was convicted of war crimes at the Nuremberg Trials and spent 20 years in jail until 1966. He died in 1981.