Items can be shipped internationally for less than $3, and in the USA for less than $1.50. These items are shipped via letter mail. Only items designated as "letter mail" can be combined into the cheap shipping option. See Letter Mail Shipping for a list of these items.
Please note that letter mail does NOT provide tracking information. Shipping times in the USA average 5 buisiness days, while international letters usually arrive between 10-15 business days after shipment.
Orders placed by 10:00pm Eastern time will ship on the next postal business day.