Have you thought of sending it in a medium/large sealed bubble/padded envelope? Or is that what you are talking about? They usually offer those at the post, or you can buy them at any Target. They're about $1.50ish, but should count as a package to be mailed, which would bring the shipping w/ tracking to about $3.00 - 3.30.
I think I can get the same effect w/ cheaper envelopes and air packing that's lying all over the fucking place at my house.
New PowerPuff Girls. They all have evil pornstart eyelashes.