In keeping with the season, here's a tid bid about a Valentine's day card: - http://www.ananova.com/news/story/sm_2198604.html World's dearest Valentine's card? The Royal Mail has revealed images of what is thought to be the world's most expensive Valentine's card. Dating back to 1790, the intricately designed Valentine filled with heartfelt messaging would fetch up to £4,000 if auctioned today. It is currently housed at the British Postal Museum and Archive - and they have no plans of selling the card. The card is a handmade puzzle which unfolds to reveal poetic messages - a far cry from the short notes written in today's Valentine's cards. On the outside of the card, the inscription reads: "My dear the Heart which you behold, Will break when you the same unfold, Even so my heart with lovesick pain, Sure wounded is and breaks in twain." Patrick O'Neill, from Royal Mail, commented: "This year Royal Mail will be delivering over 12 million Valentine's cards but probably none as romantic as the verse written inside here. "Although the card is a valuable piece - we would never dream of selling it as can you really put a price on true love?"