a guy in mn sent me an ac hose to copy. it cost him $12.75 to express mail it to me. i made the hose and put it in the exact same box. went to the post office to mail it back to him. same box,same hose with $13 in my pocket. it cost $48 for me to express it back to him! even regular snail mail was $31. so im wondering why the huge price difference for the exact same box? just going the other way.