Genuine Undated on both sides 20p Mule Coin !

I have a Genuine Undated on both sides 20p Mule Coin in excellent condition, Please feel free to make me an offer and I will contact the highest bidder above 100. This is a good opportunity to own a collectable Royal Mint error coin. In November 2008 a number of 20p mule coins were incorrectly minted resulting in their having no date. This problem affected less than 50,000 coins of the 136 million 20p pieces minted in 2008-09 and was due to the previous obverse (the ‘Heads’ side) being used with the new reverse (the ‘Tails’ side) design, meaning the year of issue did not feature at all. The London Mint Office bought back 25,000 from circulation so they are becoming rarer. These coins remain legal tender and still have a face value of 20p.