A signature from US president William Henry Harrison is among the highlights of Nate D Sanders' current auction, with an opening bid of $20,000.
Harrison (1773-1841) was the shortest-lived president in US history, presiding in office for a total of 32 days in 1841 before dying of pneumonia.
Famously, his inaugural speech lasted a gruelling two hours on a cold day in March, making it the longest in American history. Some have attributed Harrison's lack of warm clothing at the event to his death, although he didn't become ill until almost a month later.
His signature is extremely rare.
We've got some fascinating presidential memorabilia available.
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