Okay, I'm confused. I keep seeing these ads that say if I want them to insure the knife that I just paid for, I have to include an additional sum of $7 or so.
When I sell a knife, it has been my practice to use USPS Priority Flat Rate Box with tracking number and I always buy enough insurance to cover the knife in case it disappears en route.
I've always heard that:
It's the buyer's job to make sure that the seller gets the money.
It's the seller's job to make sure that the buyer gets the knife.
So the seller has the responsibility of getting the knife to the buyer, and must refund the buyer's money if the knife is gone.
It stands to reason..to me, anyway, that the seller should buy insurance to protect himself, if the knife is not delivered. Because, IMO, the purchaser is going to get his money back and will NOT stand the loss.