ITA. I feel like it is the responsibility of the seller to maintain contact with the buyer and provide delivery confirmation. How else are we supposed to track packages??? And I feel like the seller should make it a priority to ship the sold items within 1-2 business days after receiving the payment. If the buyer has paid you promptly, then why not ship just as promptly? I know we all have jobs and/or other responsibilites but how hard is it to stop at the post office before/after work (or even during lunch) to mail a package? Its only fair.