Warning:  USPS is not as economical as it may appear.  After improving a bit over the last year or two,USPS service seems to be deteriorating once again.    Please be aware that USPS only includes insurance up to $100 for its domestic shipments, and varying amounts for overseas shipments.  Please ask for full insurance and we will send you an invoice for any difference in cost.  Two of our shipments are missing as of this writing, and those customers did not ask for insurance.