I bought something recently on ebay from a seller with reasonable feedback. It was inadequately packed, the envelope was torn in the post and part of the contents lost. I had been charged £2.99 for postage but the seller put only two second class stamps (46 pence) on it - not enough to cover the weight when the packet was full, so I know he/she did not get it weighed or get proof of posting, so no possibility of compensation from the post office. (The seller could have used a padded envelope, which was what the contents needed, and paid the correct postage, and still made a good profit on the postage charged.) The seller does not use paypal. He, assuming it is a he - a Chinese name so I'm none the wiser - says it is not his fault, but has offered me Chinese bank notes as a replacement, which I declined.
He says if I leave negative feedback he will do the same to me. I don't see why I should get negative feedback because he could not be bothered to pack and send the goods properly.
It's only a small amount to lose but I feel really angry and bitter about it.