I shipped an item the seller says was bad

Hate , a harsh 4 letter word that I hate to use. No better word to use in the following comment...
I HATE styrofoam peanuts.
Trying to properly pakcage a part sometimes make me wish I hadn't sold it in the first place. We've all seen those TV infomercials that say, "Second one free. Just pay addition shipping and handling ( 8.95 )." I can understand that.