I've dealt with one or two people like that on eBay. On any package I send out I always put some sort of tracking number. I use Stamps.com ($15/month) to print my postage. The delivery confirmation numbers cost nothing for priority & express mail, otherwise it's 19 cents for other shipping methods like 1st class and media mail. Plus the postage rates are discounted a bit for printing the postage online instead of paying for it at the post office. I do a lot of shipping so for me it's well worth the $15/month for the Stamps.com service.