Make sure you have permission for everything you choose to sell. You don't want to sell something your parents still want! Also, consider an object's personal value before you sell: even if something is only worth ten dollars to someone else, it could have sentimental or nostalgic value for you or your family which is worth significantly more than ten dollars.
E-books represent about 20 percent of all book sales in the U.S. The good news is you don’t have to be a publisher with deep pockets to get in on the action. As a solo internet entrepreneur, you can sell ebooks directly from your own website. You can sell your own works or sell a public domain work. Simply upload it to your website (or seller account on Amazon) and start publicizing it on your social media platforms, on your email list, your blog, website, etc.