From unwanted gifts to pre-loved items, there’s no shortage of things to buy on eBay. This includes an array of coins, of which some have been dubbed as “rare” by their sellers. While this could be great news for some avid coin collectors, it’s important to be aware that a number of these listings won’t come cheap. Take, for example, a 50p coin of the 2017 Tom Kitten variety which pays tribute to the late Beatrix Potter. The coin has a starting price at auction of £900. The seller, “elizho-10”, has also listed a £3.95 postage fee for economy delivery. As well as posting pictures, the eBay user has added a brief description. “Beatrix Potter Coin 2017 Tom Kitten, fantastic condition,” they wrote. The seller also claimed: “Coins are a good investment as they will only increase in value.” So, is this coin really rare, and is it actually worth £900? It’s down to the buyer as to how much they’re willing to pay, however there are some facts about this coin which are readily available. Its mintage, for instance, is 9,300,000. The website Change Checker explains that when it comes to scarcity, this 50p is relatively common - ranking at one on the scarcity index. Meanwhile, the coin experts behind Spend it? Save it? What should you do? have valued it at £4 - eight times the face value. The coin was issued in 2017 in order to celebrate one of Beatrix Potter’s much-loved children’s stories - The Tale of Tom Kitten. Designed by Emma Noble, it depicts the cheeky character, and also has the name Tom Kitten on it. While the seller may insist this rare coin is a good investment, it’s important that buyers are aware of a warning that’s been issued about coins listed online. In the guide Spend it? Save it? What should you do?, Phil Mussell and the Coin News Magazine team explain that sometimes coins are put up for sale with a far higher asking price than they’re worth. This makes other coins, which are still listed with a price tag for far more than they’re worth, seem far cheaper. As such, it increases the appeal of these lower-priced coins - meaning many buyers end up purchasing a coin for more than it’s worth. So, it could be a good idea to take some time to do your research and, where possible, seek expert advice. READ MORE: 'Rare' Paddington 50p coin which left experts divided is selling for £600 on eBay - why? Which are the rarest £1, £2, 50p, 20p, 10p and 2p coins? Rarest £2 coins The rarest £2 coin is the 2002 Commonwealth Games NI coin with 485,500 in circulation. This is followed by the 2002 Commonwealth Games Wales which has 588,500 in circulation. Next up is the 2015 Navy, and there are 650,000 in circulation. Rarest £1 coins The most rare £1 coins are all part of a series celebrating the British capitals. The rarest of these is the 2011 Edinburgh coin, with 935,000 in circulation. Of the 2011 Cardiff coins there are 1,615,000 in circulation, while the 2010 London coin has 2,635,000 in circulation. Rarest 50p coin The rarest 50p coin is the Kew Gardens coin, which is also the rarest coin in circulation. It there were only 210,000 minted. The football Olympic 50p coin has 1,125,500 in circulation, and the wrestling coin has 1,129,500 in circulation. It is not so easy to evaluate the rarest 20p coins, 10p coins and even 2p coins as exact circulation figures are not known. However, various versions of the coins are known to sell for large sums. These include the dateless 20ps, which are actually part of a run from 2008. There may be between 50,000 and 200,000 of these coins in circulation. The 1983 'New Pence' 2p coin can also sell for a huge sum, up to £650.All rights reserved for this news site express.co.uk and under his responsibility