I sell on both Alibris and Ebay. On Alibris orders, I have to go to the post office to get proof of shipping and delivery confirmation costs an extra $.80. On ebay I can print media mail labels with delivery confirmation costing $.19 and I never have to leave the office. Because I'm a small seller paying higher fees, this makes my breakeven book price is about $2.99, not counting gas and time going to the PO. Any suggestions?