Meanwhile, the rarest 10p is the R for Robin coin, which has moved up two places in the Scarcity Index.
When we checked eBay today, we spotted one that had sold for £14 although some have gone for a lower price of £3.99.
In terms of £2 coins, the most sought-after is the Northern Ireland Commonwealth Games piece.
Change Checker says this could fetch you £45 on eBay if you’re lucky enough to find one in your change.
Here is the latest Scarcity Index broken down.
Rarest 50p coins – worth up to £200
The Kew Gardens 50p has once again topped the rarest 50 pence piece list – so it’s worth keeping an eye out for one of these coins.
Created by Christopher Le Brun RA, its features the famous Chinese Pagoda from the gardens being intertwined by a leafy climber.
This coin was released in 2009 to mark 250 years since Kew Gardens opened in 1759, and there are only 210,000 in circulation.
The next most sought-after coin is the 2011 triathlon 50p, which was released as part of the 2012 London Olympics collection.
There are around 1,163,500 of these in circulation, with its design featuring someone running, cycling and swimming.
Experts say these can sell for around £11 on eBay – not bad for a coin only worth 50p.
Finally, the third rarest coin on the list is now the 2011 wrestling 50p, which is also part of the 2012 London Olympics set.
There are slightly less of these in circulation at 1,129,500 compared to the triathlon 50p, with its design showing two people in the wrestling ring.
One in good condition could make you £6.25 online.
Rarest 10p coins – worth up to £14
The 10p list is made of the alphabet A to Z collection, released in 2018 and 2019 to celebrate all things British.
There are 26 coins in the set to correspond with the 26 letters in the alphabet.
The rarest one from that collection is now R for Robin, launched to celebrate the much-loved red breast bird.
Its design features a robin sitting in the letter R with snowflakes falling around it.
Around 284,000 have been released into circulation in total, with one recently selling on eBay for £14.
Next on the list is W for World Wide Web, which was previously top of the rarest 10 pence pieces on the last Scarcity Index.
This coin has the letter W surrounded by a spiderweb.
Some 283,000 were issued for circulation in 2018, and we’ve spotted one that sold for £9 online in recent weeks.
In third place on the Scarcity Index is Y for Yeoman Warder, launched to celebrate the guards of the Tower of London.
The design depicts one Yeoman Warder posing next to the letter Y.
If you have one, the highest it’ll likely go for on eBay is around £10.
Like the W coin, around 283,000 were circulated in 2018.
Rarest £2 coins – worth up to £45
The top three coins in terms of the
rarest £2 pieces
are once again all from the Commonwealth Games 2002 collection.
The most sought-after is the Northern Ireland version, which comes ahead of two other editions designed for England and Scotland.
The Wales version is number 11 on the list.
All the different editions feature the same base design and you can only identify them by their respective flag.
If you’ve got the Northern Ireland version, of which there are 485,500 in circulation, they’re currently selling for around £45 on eBay.
However, we have previously seen examples sell for as much as £80 several months ago.
In terms of the England edition, there are 650,500 copies in circulation and a mint version could sell for £30 online.
Or if you have the Scotland coin, of which there are 771,750 in existence, it could fetch around £17 to £20.