Is that the tape the lady at the post office put on it? Was there no tape on it before? That is not a properly taped box (even the postal lady knew that) and I can certainly see why it arrived empty. Personally, I would be refunding the $65.00 to the buyer and then working on recovering the $50.00 it was insured for myself since I was the party that actually purchased the insurance.
My method of packing and shipping is done like inkjunkie describes. So far everything has arrived safe and sound but if anything is ever damaged in the future they won't be able to say it was because lack of packing, good box or tape.