Why do some members stiff me?

Oh don't get me wrong, I have done several deals with members here and have worked out just fine. I can't remember the members name. But I bought a B & M torque master converter from and the hub was taped up when he removed it a long while before. Unknowing to him, when I got it and removed the tape it was all rusted and pitted so I couldn't use it. What did he do. Told me don't waste the money shipping it back to him and that he would refund my money. And he did. I just wish I could remember who it was so I could mention his integrity here.