A lot of 50 press badges intended for John F Kennedy's welcome dinner in Texas on the fateful date of November 22, 1963 carry a minimum bid of $10,000 at Nate D Sanders.
The online sale is due to close on June 26.
On the day of Kennedy's assassination he was due to attend a meeting at the Dallas Business and Trade Mart, before leaving Dallas for Austin.
These plastic press passes are inscribed with the names of Mr & Mrs Kennedy and Johnson and offer a fascinating glimpse into an alternate history.
Also featured are a set of 58 press tickets to the welcome dinner, which will start at $7,500.
We have this original poster from Kennedy's 1960 leadership campaign available.
Other lots in the sale include a travel pass signed by Adolf Eichmann, a high-ranking Nazi who was one of the chief architects of the holocaust.
The pass (which carries a minimum bid of $8,500) is dated May 14, 1943 and was issued to a soldier named Paul Wellnitz.
It authorises a transfer to the Stutthof concentration camp, where Wellnitz worked as a guard until the end of the war.
Wellnitz was among a large number of workers and officials sentenced to death at Nuremberg in 1947.
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