If you need guaranteed next-business-day or second-business-day delivery, or if you want your package to be trackable online, we offer shipment by Express Mail starting at $20.  Please note that Express Mail is the only domestic USPS service that provides online tracking and guaranteed delivery by a given date; if on-time delivery is critical, we strongly recommend Express Mail.

For deliveries outside of the USA, Global Priority Mail is a fast and economical service.  Delivery at the destination country is by the local postal service, and basic online tracking is available.  Insurance is limited to $100, however, and there are a number of countries for which Priority Mail is not available -- Italy being the most notable instance (full USPS list of countries and services here). 

For higher-value items, we recommend either Registered Mail, starting at $20, or Global Express Mail, starting at $25 ($20 for Canada), insurance included.  Registered Mail offers maximum security, but can be very slow -- up to several weeks, in some cases.  Express Mail is fast and fully trackable, but will not deliver to Post Office box addresses, since delivery at the destination country is done by a local courier company.  For very inexpensive items, we also offer ordinary airmail; this service does not include insurance, and is at buyer's risk.  We strongly recommend other options for anything worth over $100, and reserve the right to refuse ordinary airmail shipment for orders paid via Paypal.