My listings include some lightweight flat items, such as stamps, antique postcards and valentines, etc. Usually these are not high-dollar sales. After paying Final Value Fees, I am not left with much profit. And then there's shipping.... Even the lightest weight USPS package costs $4.50. I would like to ship these things as first class letters or flats, but there seems to be no way to do so on Ebay. Small bubble mailers – same story, $4.50.
Short of just using USPS stamps, is there a better way to ship a first class letter with tracking? (USPS website wasn't any better.) TIA.