Why is price different than I expect?

There are two settings that can affect your order cost:

Print Protect

Enabling print protect adds a flat fee to every postcard mailer.  This setting can be changed on the Settings Page Here

First Class vs Standard Mail

Mailers are sent First Class by default.  Sending via standard mail can save you shipping cost on every mailer.  For the cheapest send rate possible this should be enabled on the Settings Page Here.  Standard mail item delivery times will be an extra 5+ days, will not have tracking status, and will not be returned to sender on incorrect delivery.