I heard people who sell things on Ebay or Amazon can print out mailing labels at home and get discounted postal rates from the US postal service. I am considering selling my old books online. How do I arrange for the discounted postal rates?

The only thing that you can get is a free delivery conformation on Parcel Post or Priority mailing. You can also ship Media mail which is cheaper than mailing with the PP or Priority. Other than those options we don't offer discounted postage rates.