I think it will be more than 4$. If you secure them well in a box with some paper to stop shuffling, do media mail with tracking it should be around 8-10$ according to the location of the winner. I highly suggest tracking, keeps both sides of the transaction covered and it is 1.05$ to track media. I have had the post office check media mail and return comics as non-media deliverable but, one 2 times out of many.If it goes regular parcel post it will be about 14$, just my opinion,...I could be wrong.
David I think you are spot on with the shipping. Media mail is a crap-shoot. If you ship through PayPal there is a discount and the tracking is included free. Just a thought. Joe