We will always combine shipping. If items are on sale, we will need to refund you within 24 hours. Shipping policy for domestic small items: The highest shipping plus 85 cents per lot. Larger domestic shipping items are the highest shipping plus $1.00 shipping. Large albums and heavier items vary. The product is a United States stamp issued between 1881-1890, which has suffered from a printing error where overinking has led to an impression on the back of the stamp. This rare and unique aspect makes it a valuable collectible item for stamp enthusiasts, specifically those interested in United States philately. The stamp is classified as "Extremely Fine" quality, adding to its desirability among collectors.