You could do shipping for way cheaper if you folded it up & put it in a padded envelope. I do that with all the shirts I auction off & I think the most I've ever paid to ship one was maybe $4.
last one i sent out in an envelope was 5.35 exactly. i can bring it down some but i just set it high enough so that i am covered no matter what i am sending. i set the same exact price for all that i ship. and only guess at what the shipping might be.