Isaac Newton wasn't just one of the greatest scientists of all time and a fan of apples. He also revolutionised our money.
He was appointed Warden of the Royal Mint in the spring of 1696, and Master of the Mint three years later. He held the role for more than 20 years, interviewing criminals, making coins better, harder to forge and experimenting on them to test their purity.
See also: The most valuable 50p coins
So, as a celebration of the 375th anniversary of his birth the Royal Mint produced special anniversary 50ps, with the first 375 of them released at Woolsthorpe Manor, Lincolnshire, where he was born and lived.
They're now listed for hundreds and at least one has sold for 60 times its face value.
According to The Sun, it went for £120 and the seller and confirmed he's received the cash.
But it's far from the only valuable 50p out there. Here are the 5 most valuable:
1. London Olympic 50p coin, worth £3,000
To celebrate the Olympic Games, 29 different designs were released, though some designs were produced in greater quantities than others.
Normally, a full set will fetch you approximately £35, whereas some of the more desirable or rare designs such as football, wheelchair rugby, wrestling and tennis can command £3 or £4.
But if you're lucky enough to have an original aquatic coin, which shows water passing directly over the swimmer's face, then you've hit the jackpot.
Only 600 sporting this image were released before the designed was altered to show a clearly visible face. Encouragingly, one of the original coins was recently listed on eBay for £3,000.
2. WWF collectors edition 50p - £1,000
This very rare 50p was releases as a collector's edition, with special versions going for £1,000 on eBay .
But any version of this coin is worth a lot, with even standard circulated coins selling for more than £10 .
3. Peter Rabbit 50p - Hundreds
This was the fastest-selling collector's edition 50p the Royal Mint ever released. The coloured versions sell for hundreds (a few weeks after their £55 cost at launch), but even the standard versions are going got many times their face value.
4. Suffragette 50p - £10
One of the rarest 50ps in circulation. The best are selling on eBay for £25 , with even average ones selling for £10.
5. The EC commemorative 50p coin, worth £20
The MEN reports, "Back in 1992 and 1993 the Mint issued a commemorative coin to celebrate the British presidency of the council of Europe.
"109,000 coins were issued, compared to as many as 12 million usually, making it collectable.
"The coins are no longer in circulation because the 50p piece was reduced in size in 1997, but if you have one in your penny jar at home it could be worth as much as £20."