WooCommerce Simple Auctions is a popular plugin that adds auction features to the WooCommerce platform. This plugin allows you to create an Ebay-like experience on your website by incorporating regular and reverse auctions alongside your usual products.
You can see a demo of WooCommerce Simple Auctions here: https://codecanyon.net/item/woocommerce-simple-auctions-wordpress-auctions/6811382
Please note that the plugin file has an "UNTOUCHED" status, meaning it contains the original developer's code without any modifications.