With YITH Multi Vendor you can turn your e-commerce store into a marketplace (a multi-vendor platform) like Amazon or Etsy. Turn your e-commerce store into a marketplace (a multi-vendor platform) and earn commissions on orders generated by your vendors.
When used with YITH Name Your Price, also vendors will be able to enable this option on one or more of their products and let the user choose the price (also between a minimum and maximum values, if you want to).
Make sure you have installed and activated both plugins. Then, enable the Name Your Price integration from YITH > Multi Vendor > Modules.
The vendor will be able to see a new Name Your Price menu where he/she can create customized price rules for product categories.
Moreover, just like the admin, they can enable the Name your price option from the single product settings to enable it on specific products only.
For more details about YITH WooCommerce Multi Vendor plugin, please refer to the plugin documentation.