There are a number of ways that you can create a free eCommerce website. One way is to use a platform such as Shopify or Squarespace, which will provide you with the tools and templates necessary to create a professional looking website.
Another way to create a free eCommerce website is to use a WordPress plugin such as WooCommerce or WP eCommerce. These plugins will turn your existing WordPress website into an online store.
Finally, you can also create a free eCommerce website by using a service such as Amazon Webstore or Ebay. These services will allow you to create a store and list your products for sale.