iBid is a Multi Vendor Auctions WooCommerce Theme is a great design idea for auction websites and online marketplaces.
Demo: https://themeforest.net/item/ibid-multi-vendor-auctions-woocommerce-theme/24923136
WooCommerce Simple Auctions plugin enables you to create professional auction website or Ebay clone with regular, proxy, sealed (silent) and reverse auctions along with your normal products.
Demo: https://codecanyon.net/item/woocommerce-simple-auctions-wordpress-auctions/6811382
Manage online auctions to sell your products: the business model users just can’t resist.
Demo: https://yithemes.com/themes/plugins/yith-woocommerce-auctions/
Dokan Simple Auctions offers its suppliers the ability to sell auctionable products? This add-on for Dokan integrates the WooCommerce Simple Auctions plugin in the merchant dashboard!
Demo: https://wedevs.com/dokan/extensions/dokan-simple-auctions/