This knife comes from a set of cutlery found at Hitler's home. It was taken by an American soldier at the end of the war.
It was sold at an auction on 19 January in Ludlow in England for $1800
Last updated: 26 january, 2010 - 18:03 GMT
Hitler's fish knife: the trade in Nazi memorabilia
This anti-Semitic book, written by a German teenager in the 1930s, was recently put up for auction in England
Sixty-five years ago, Soviet soldiers liberated the Nazi's biggest concentration camp, at Auschwitz in Poland, where more than a million people, most of them Jews, were killed.
Hitler's fish knife
Auschwitz, now a memorial and museum, was back in the headlines last month when the iconic sign hanging above its entrance saying Arbeit Macht Frei, or freedom through work, was stolen.
It has since been recovered and several people have been charged over the theft.
It is not known why the sign was taken, but the suspicion is that the theft was commissioned by a collector, or someone who wanted to sell it to a collector of Nazi-era memorabilia.
The BBC's Claire Bolderson has been looking into the trade.
To play this content JavaScript must be turned on and the latest Flash player installed.
First broadcast 27 January 2010
related bbc links
~RS~a~RS~worldservice~RS~q~RS~~RS~z~RS~35~RS~){kind=small}
bbc.co.uk navigation
BBC links
BBC © 2013 The BBC is not responsible for the content of external sites. Read more.
This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.