Under the law in all fifty stares for over twenty-five years, the risk of loss of an item of "consumer goods," such as a knife intended for non-commercial use, is 100% on the seller until the knife reaches the buyer IF there is an agreed delivery address UNLESS the buyer expressly agrees otherwise.
My experience: a few years ago an ePrey seller in Finland, who turned out to be a Chinese exchange student, sold me a puukko and mailed it in a plain paper business envelope - no wrap; no padding; just the envelope. Only the sheath arrived. Informed, he proposed a 50% refund. I reversed the credit card payment 100%. He "punished" me by preventing me from buying from him again.
For a buyer, paying via a credit card or Paypal goods and services is the safe bet for these situations.