I sent a fancy tonearm cable back to the maker for repair recently. I'd managed to pull a multi pin plug off one end and didn't fancy trying to solder it back on. Rather foolishly I didn't discuss price and just expected an invoice when the work was done and before the item was returned, so imagine my surprise when I received an email saying the cable was on its way back to me and there was no charge. Given that I'd bought the cable second hand from someone and the original maker owed me nothing, I thought he was so kind, and his service was so good, I sent him a payment to cover postage and insurance and something for his time. Does that count? It is an excellent cable by the way.