By Matt Quinn, Assistant Director of Currency
Most collectors are interested in securing banknotes produced prior to their births, but as time goes on more and more people develop a passion for modern bank notes. Several issues of currency produced no more than half a decade ago are already scarce and in some instances, rare. As with older notes, print runs and circulating periods are the principle factor in rarity. As variety collecting gains in popularity far more rarities are being identified within particular currencies.