We are trying to fine tune our shipping as much as possible. Trying to get you your treasures safely and as economical as possible. We have tracked Priority Mail taking 7-10 days wasting your money, so when ever possible we are looking at shipping ground since from Colorado that delivery time is often 4-5 days --Quicker than Priority Mail. Also we are considering FedEx and UPS ground. We will confirm shipping method when your order is confirmed.