The high value note was issued in 1935, when it could buy you two average-sized homes and was worth five times the average salary. We wouldn't fancy walking around with that in our back pocket!
But everything higher than a £5 note was pulled out of circulation after a Nazi plot to flood wartime Britain with forged money was discovered.
The planned plot would put £130m of fake currency into the economy, so the banks acted quickly to pull notes higher than £5 out of circulation.
Those notes taken out of circulation were destroyed - but 63 of the £1,000 notes were unaccounted for and it's thought that at least 20 still exist somewhere.
Although £1,000 would now be worth around £30,000 in this economy, it is expected that the note will fetch around £20,000 at auction.
We still wouldn't mind having that!
By Chanel O'Etienne
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