THERE is a lot of money to make from checking your purse, wallet or down the back of the sofa to see if you have a rare coin. 

Error coins have been known to sell for a huge profit on eBay or at auction. 

Here is a list of some of the rarest coins that scooped their owners a pretty penny. 

Christmas-themed coin sells for 9,000 times face value

(Image: The Britannia Coin Company)

This super rare 50p coin sold for a whopping £4,500 in Wiltshire due to an unusual error.

The Britannia Coin Company sold it to a private collector after having it 
authenticated by The Numismatic Guarantee Company.

The coin is a rare mint error Gibraltar 50p that has a portrait of the late Queen Elizabeth II on the head side, along with the date 1990.

On the tail side, there is a Christmas-themed design showing a choir boy and a puppy.

'Holy grail of change collecting' sells for 400 times face value

(Image: eBay)

This 20p coin with a rare Royal Mint error sold for 400 times its face value on eBay. 

Twenty pence pieces were struck without the year by The Royal Mint in November 2008. 

The Mint reports that of the 136 million twenty pence pieces minted that month, only about 250,000 coins were minted with this unique error. 

These coins have been described as the 'holy grail of change collecting' by The Britannia Coin Company of Royal Wootton Bassett. 

One seller managed to scoop £80 by selling their rare coin- 400 times its face value. 

Another huge profit on a 20p error coin 

(Image: eBay)

Another seller, in Stourport, sold their mishap coin for £69.99 - nearly 350x its face value. 

The undated 20p coin was sold in June by eBay. 

The Britannia Coin Company of Royal Wootton Bassett has been known to sell their 20p coins for £90.

The site said: "The issue occurred because an old obverse ('heads') design was used with the new royal shield of arms reverse, introduced in this year.

"The previous Tudor rose design had the date on either side of the crown. When this was replaced with the shield, the date was moved to the other side. 

"It was moved on most 20ps but not these ones, which bear no date at all.

"These coins have been circulated, so they will show the signs of wear typical of change that has been in wallets and cash registers.

"The only difference is this unusual error."

London Olympic coin scoops gold for seller

(Image: eBay)

This coin commemorating the 2012 Olympic Games was sold for a huge sum in Worcestershire back in May. 

The seller, from Kidderminster, made a sizable profit after selling a 2011 Olympic football 50p coin, more commonly known as the Offside Rule 50p.

The coin had a number of buyers bidding for the object and it finally sold for £12.73 - over 25 times its face value. 

The Britannia Coin Company of Royal Wootton Bassett said the 50p coin is one of 1,125,500 made which entered circulation. 

It is one of twenty-nine commemorative 2012 Olympic 50ps issued by The Royal Mint.

Rare coin featuring King Charles III sells for princely sum

(Image: eBay)

A bag of the 'most talked about 50ps in the coin community', featuring King Charles III, sold for an incredibly large sum back in March.

The roll-out of King Charles III 50p coins is in full swing with many being sold as collectibles on eBay.

One Kidderminster seller managed to make a nearly £200 profit after selling a sealed bag of Atlantic salmon 50p coins.

The coins had sold for £170 - far more than its combined face value. 

The Atlantic Salmon coin has been dubbed by the online coin site Copes Coins as one of the "most talked about coins in the coin community".