Rare Irish Half Crown for sale

I have this very rare1961 “Mule” Irish half Crown for sale. The mule half crown has some different design features than the regular half crown of that year, for example the tail has eight strands instead of the standard seven strands. The I is closer to the O in Coróin The PM is further forward from the foot . This coin is graded very highly XF-45 . How the “Mule” half crown occurred is there was a mistake made in the Die when producing half crown coins and that increases the value a lot as they are very rare. This coin is a collectors item not just a Half crown as all these little design differences make the coin a real collectible. I am asking for 190.00 Euro or nearest offer which will include registered postage . Thanks for looking