I think many sellers have this rationale: When you leave feedback before the buyer, you run the risk of the buyer leaving negative feedback and not having a chance to explain 'your side' to other sellers. I guess that sounds a little retaliatory, and there is kiss and make up, but if someone leaves feedback that the item was broken three months after they purchased it, and then won't respond to messages, the seller could explain in feedback that the seller did not notify them of the issue, and that you gladly refund or repair damages.