You say buyer's ONLY obligation is to send money, this is incorrect if a buyer leaves me negative feedback without contacting me first to resolve the issue I leave him it in return let me explian this a little. If a buyer buys a model from me, the model gets broken in the post so the buyer leaves me negatiuve feedback. Had the buyer contacted me first I would have mot likely offered him a refund if he returns the item etc. If a buyer chooses not to do this it warrants negative feedback... I'm assuming you don't sell anything on ebay then?