Depends on how much you're sending. I'm sending a second package to Germany in a couple of days: 65 cards in two 9-pocket pages in a large business envelope for $6.97 (I rounded it to $7.00 in his case). I sent about 110 cards to the same address for $8.85 shipping in the same manner back in May.
They were received and the member was happy with the condition that they arrived in. I did have to fill out a customs form. A concern between both of us was the possibility of additional taxes, but in our transaction that was avoided.
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“Aslan didn't tell Pole what would happen. He only told her what to do. That fellow will be the death of us once he's up, I shouldn't wonder. But that doesn't let us off following the signs.” - Puddleglum in The Silver Chair by C. S. Lewis