The auction website eBay is used by millions of people all over the world each year. There are a variety of supplementary marketing tools that are available through eBay or through auction tools at third party websites to help optimize your selling experience on eBay. One of the best ways for a seller to promote his sales inventory is by linking to his other items. On every seller's listing, there is a "See other items" link underneath her name that directs potential buyers to a gallery view of all the seller's current items. However, only sellers with store accounts have access to eBay's promotional boxes tool.
Instructions:
1) Access the My eBay page by clicking on the link in the top right corner of any eBay page. Sign into eBay with your username and password.
2) Click on the "Manage My Store" link from the navigation menu on the left side of the page in My eBay.
3) Find the "Promotional Boxes" link on the left side of the page. Either make small customizations to an already made promotional box when you choose the "Guided setup" option, or pick "Create new promotion box" if you would like to create your link box from scratch.
4) Copy the HTML code that you receive at the end of the promotional box creation process. Manually place it on the page of a listing by pasting the HTML code of individual listings pages. Alternatively, choose the promotion box layout option when creating a new page to have your promotion box added to all new pages. Decide between placing the promotional box(es) near the top of the page or underneath the bottom navigation bar.
Tips and Warnings:
For eBay sellers without stores, there are similar promotional box tools or "scrolling gallery" solutions available to you on the Web. Buyers can see all of your items when they click on the "See other items" link to view your eBay profile. Many sellers mention or encourage bidders to check out their other items for sale within their individual listings.
Source - eHow