Wow! How Has He Got Away With This!!

hard to tell with those bad pictures, but do I see a date on the reverse of 1991

Hahaha, well this is a funny listing. Yeah 1991 on the reverse, maybe he was referring to the fruit 'date' :D.

''No date on the back! There is on the front tho''-:D-And some people just paid a nice price for a normal 20p.

The only thing I can think is the coin in the picture may not represent the item on sale, but then I don't recall a 20p with the date on the front/obverse? Good thing you did due diligence prior to the purchase.

Call it "keyword spamming", call it "item not described properly", or even call it "lying and hoping nobody notices" - either way, I'd agree it's deceptive - and almost certainly it was done deliberately.

I notice that the target market is non-coin-collectors - people who know there's hype about "undated coins" but don't know what such coins actually look like. Even if you forget to read the description where he says there's a "date on the back", and even if you forget to click on the second picture to see that there is indeed the date "1994" on the reverse, the picture shown as the default picture is of a coin from the 1990s - that is not the correct portrait for the "undated mule".

Thought I would have a look at 'new pence' that had sold after reading daytr post... and I came across this?

http://www.ebay.co.uk/itm/Ultra-Rar...047675.l2557

So, Bidding has ended on this item. The seller has relisted this item or one like this.
Which means the seller has at least two of this "ultra rare coin". According to him, that's 0.5% of the whole population.

Which means that I've also sold 1.5% of said population.

Where he gets his figures from are anyones guess. The truth is nobody knows, although sales data does seem to suggest that the mule in the Heinz 1983 set is rarer than in the Martini packaging.
One of the three that I've sold was a circulated coin that had obviously been broken out of the packaging.

I couldn't justify paying even £50 for any decimal coin (unless was precious metal)

but, I am not judging, because I have paid close to this for non precious metal coins, but not so new

That 1983 2p is definitely a much sought after error but some people have gotten confused by the details regarding which 2p with New Pence is rare and subsequently someone bought a common 1981 2p thinking it along the lines of that coin ....