We ship almost everything by priority mail. It's more secure, and vastly easier than running around town looking for packing materials all the time. Since it's just Patty and I doing this, we generally ship once a week, usually on Fridays. Please be patient — we're sometimes a little slow!
The USPS postage calculator works pretty well for shipments in the USA, but gets a little wonky with overseas shipments. There are a plethora of rules on how big and how heavy things can be and still go by first class mail, and lacking such information, the calculator charges at the very exorbitant priority rates. I can't fix the calculator, but I can (and will) refund the difference. Sorry!