Read it, understood it. The buyer wasn't answering communications, shipped without an agreement to do so, without tracking, insurance or signature of delivery protections. Have I missed anything?

I had a seller try to sell me something 'not as described', when I called him on it he tried to open a case against me. PP said to return it, I did at my expense with tracking & insurance. He tried to say it never got there (sorry, got your sig!) and tried to charge me with not shipping it. Odd thing was, he advertised the item within 2 days of getting it back. I sent the link to PP, he wriggled out somehow without being banned. 

It would appear the 'mistakes' the buyer made could be to muddy the waters while the 'engine' (which, oddly, may resemble loose rocks) gets shuffled here and there. Innocent mistakes? Really, are you and the buyer that naive?