http://www.google.gr/url?sa=t&rct=j&q=&esrc=s&frm=1&source=web&cd=6&cad=rja&uact=8&ved=0ahUKEwiFzMegmb_KAhWShhoKHakCB3cQFgg1MAU&url=http%3A%2F%2Fmentalfloss.com%2Farticle%2F53557%2F10-most-expensive-coins-and-banknotes-world&usg=AFQjCNFV1Sfp7ts4xmyo2gM08mDToeGB8g