Tiny unremarkable error on your 20p coin that makes it worth 485 TIMES its face value after sparking eBay bidding war

A TINY unremarkable error on your 20p coin makes it worth 485 times its face value as a fiery eBay bidding war reveals.

One mistake made for the first time in 300 years caused 250,000 "mule" coins to become a collectors item - cue to check pockets now.

After a fiery bidding war on eBay, one savvy seller flogged their rare 20p for a whopping £97.

At a glance the coin may look normal, however, look a bit closer and a key bit of information is mising.

Prior to November 2008, the Royal Mint switched the position of the date on the 20p coin from tail to head.

But this was not the case for this batch of coins.

Shockingly, they were produced without a date on them.

And now, one has sold on eBay for 485 times its worth.

It comes after another savvy seller flogged a rare coin for 300 times its worth.

A particular 50p sold for a whopping £135 on January 16 - it features an architectural masterpiece which lies in London's famous Kew Gardens.

The 50p coin, which could earn you hundreds of pounds, features Kew Gardens' iconic Chinese Pagoda.

The Chinese Pagoda, a Grade 1 listed building was constructed in 1761 as a gift for Princess Augusta of Wales.

It also features a "decorative leafy climber twining in and around the tower".

Along with the markings 1759 - to represent when the gardens were founded - and 2009 - for when the coin entered circulation.

One savvy seller took to eBay to flog their 2009 coin.

It sparked an eBay bidding war, with 13 eager collectors desperate to snap it up.

The lucky new owner was sent it in a display box.

When it comes to bidding on eBay, the seller tends to set a starting price and buyers place bids to compete with eachother.