Ya well those are nice ideas to sell by if you have all the time, money, and resources... I talked to the guy on the phone and he told me he was married, turned out to his mom nonetheless heh. Then I shipped usps and I was going to spend more for tracking, there's no point to spend extra when usps hasn't lost anything for me. For what I was shipping I had no doubt it would arrive, and having proof of it would of changed this kids actions. My mistake was the split payment, and on that I learned my lesson, it was dumb but I wanted my stuff sold.
In general those are good fool proof rules to sell by.