USA Used, 2000 Issue, 1960's 33 Cent Celebrate the Century, (Set of 15), Scott #3188a-3188o. Will offer a combined shipping discount for each additional single stamp purchased. 25 cents for each additional single stamp purchased added to original shipping cost. ((Discount is for US Shipping only). International shipping will be adjusted according to the # of stamps Purchased.  Also will offer combined shipping on small packets. Once you make your selection contact for combined shipping price.   Be sure to check out our store, you will find additional items for sale in this category.