I ship a coffee mug which weighs 1 lb. boxed to zip code 19012 and it costs me $7.50. I then ship a coffee mug which weighs 1 lb. boxed to zip code 02474 and that one costs me $8.00. Both mugs go vis USPS First Class mail. Both are good prices.
My web site shipping methods are: USPS Method: First Class Commercial First Class Mail Retail Ground
My web site (memories4sale.com) sells a similar mug and the shipping costs to zip code 19012 or 02474 it says "There are no methods available for your shipping destination." If I use zip code 97212 I get "Authorization failure. Perhaps username and/or password is incorrect."