duck,i asked a seller one time why he holds feedback on me until i leave feedback on him.he said to make sure i didnt say anything bad that wasnt true.i told him once he got paid my debt to him was over and he should leave me feedback stating he got paid quickly and i told him when i received the package if it was what was advertised i would give him good feedback.i mean once the seller is paid the buyer doesnt owe him #$%*,so why hold the feedback.cheapo,as far as shipping issues with your customers,do you give them tracking numbers,once the package leaves your hands its out of your control to do anything about it.