WP Auctions allows you to host auctions on your blog or website completely fee free!

Noted That:

To install correctly this wp-auctions.zip.
Fisrt Download the wp-auctions.zip to your computer
Extract/Open wp-auctions.zip to Your Computer.
Then, Find readme.txt file inside wp-auctions.zip and Open readme.txt.
Now, Read the Requirements of this plugin. Which Wordpress Version and PHP Version are required to run this Plugin in Your Wordpress Site.
Then, Follow the the Tips Below.

Start the Tips:

1. First Download "wp-auctions.zip" Plugin to your Local Computer. (Click Download)

2. Then, Login to your "yourdomain.com/wp-admin" Dashboard.

3. Then, Click on "Plugins" + "Add New" from left sidemenu of Dashboard.

4. Now, Click on "Upload Plugin" button.

5. Now, Browse "wp-auctions.zip" Downloaded plugin from your computer, Where you downloaded wp-auctions.zip According to Step – 1 Above then, click on "Install Now"

6. Now, Click on "Active Plugin"

7. Then, See left sidemenu. "WordPress Auction Plugin" folder is added on left sidemenu. Now, Click on "WordPress Auction Plugin" folder.

Noted that: If you do not see "WordPress Auction Plugin" folder on left sidemenu then, see at left sidemenu "Settings" or "Tools".

8. Now you configure yourself oR Watch video tutorial below about WordPress Auction Plugin Configurtions and Settings or How to work "WordPress Auction Plugin" in your WordPress site.

After Activated Plugin According to Step-6 then,

Go to "Plugins" + "Installed Plugin" from Wordpress Admin Panel Leftside Menu.
or Direct go to: https://yourdomain/wp-admin/plugins.php
Then, Find "WordPress Auction Plugin" Activated Plugin from Plugin List.
Then, Click on "Settings" from Plugin that is WordPress Auction Plugin
Now, Edit/Add/Config the setting and Click on "Save Changes" button,

Guide

Guide
Download the plugin file, unzip and place it in your wp-content/plugins/ folder. You can alternatively upload it via the WordPress plugin backend. Activate. Set up the plugin from the WP Auctions menu in your WordPress backend. Add your auctions Sell your stuff and make money! The plugin is widget ready and the widget will appear in your “Appearance > Widgets” list. Simply drag and drop the widget into any widget ready area, like your sidebar. Alternatively, you can also add this snippet to the sidebar on your theme:

Download the plugin file, unzip and place it in your wp-content/plugins/ folder. You can alternatively upload it via the WordPress plugin backend.
Activate.
Set up the plugin from the WP Auctions menu in your WordPress backend.
Add your auctions
Sell your stuff and make money!

The plugin is widget ready and the widget will appear in your “Appearance > Widgets” list. Simply drag and drop the widget into any widget ready area, like your sidebar.

Alternatively, you can also add this snippet to the sidebar on your theme:

auctions, completely, free, website, your, allows, host, blog,

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Reffered: https://wordpress.org/