Everyone is being urged to check their change, wallets, purses and down the back of their sofas after a 50p coin sold for nearly £200 this week.

The Royal Mint coin inspired a mini bidding war on online auction site eBay, with more than 30 bids for the coin which eventually sold for £190.

The coin in question, which we should all keep an eye out for, is the Royal Mint’s Kew Gardens 250th anniversary coin.

Originally minted in 2009, the coin has become hugely sough-after among collectors after just 200,000 copies were entered into circulation.

Bournemouth Echo:

The coin features the Chinese Pagoda at the Royal Botanic Gardens on the tails side and a portrait of the Queen.

The seller description of the coin on eBay read: “This genuine 2009 circulated 50p coin features the iconic Kew Gardens design.

“A must-have for any coin collector, this piece is part of the British Decimal Coinage series and is in excellent condition. The denomination of the coin is clearly marked as 50p and it is a valuable addition to any collection.

“This 50p coin is a representation of British history and is a unique addition to anyone's collection.

“The Kew Gardens design is instantly recognisable and adds to the value of the coin. This item is perfect for collectors or those looking to start their own collection.”

Top 10 most valuable 50p coins, according to Royal Mint

Here is a list of the top 10 most valuable coins, when they were made and how many were minted:

  1. Kew Gardens (2009), 210,000
  2. Olympic Wrestling (2011), 1,129,500
  3. Olympic Football (2011), 1,161,500
  4. Olympic Judo (2011), 1,161,500
  5. Olympic Triathlon (2011), 1,163,500
  6. Peter Rabbit (2018), 1,400,000
  7. Flopsy Bunny (2018), 1,400,000
  8. Olympic Tennis (2011), 1,454,000
  9. Olympic Goalball (2011), 1,615,500
  10. Olympic Shooting (2011), 1,656,500

What makes a coin valuable?

The 50 pence piece has become the most valued and collected coin in the UK, with many collectable designs appearing on its heptagonal canvas.

Its 27.5mm diameter makes it the largest of any British coin, and allows space for decorative pictures. It has often been used to celebrate big events over the past 50 years of British history.

The rarest coins tend to be of the greatest value, with the mintage (number of coins with each design made) being the fundamental attraction for collectors.

Along with the design, other aspects of the coin which increase value are the condition of the coin and whether it has an error in its design.

The way in which it is sold can also determine the coin’s value - while some coin collectors will bid vast amounts of money on ebay or at auction, others opt for more robust valuations by selling via a coin dealer.

Rarest 50p coins in circulation the UK?

The rarest is the Kew’s Garden 50p, which was designed to mark the 250th anniversary of the gardens in 2009. Only 210,000 coins were ever minted with this design.

The Kew Gardens 50p sells for £156.25 on average, but one seller received over £700 for one when they sold it on eBay.

The other rarest coins stem predominantly from the 2011 Olympics, with the wrestling, football and judo coins among the most valuable. Only 1.1million of each of these coins were produced.

Flopsy bunny and Peter Rabbit designs which were produced in 2018 are also highly valuable.

These coins - 1.4 million of which were minted - depict the characters from Beatrix Potter’s novels and celebrate the life of the English writer and these sell for around £5.

In 2019, 500 million coins were produced, with three new 50p designs.

These included one of Arthur Conan Doyle’s Sherlock Holmes, Paddington Bear at St Paul's Cathedral and the Tower of London.