Frequently Asked Question:
How do I list using the eBay catalog?
On the One-Page Lister, choose the item's category. If the category is included in the eBay catalog, a "Find Product" link will appear. Click the link and a new window will open where you can search for the product using the item's Title, Keyword, UPC, Artist, ISBN, etc. Search terms will vary based on the category selected.
Click the button next to the item, once you have located it, in the search results and hit the Next button at the bottom of the window. On the next page, confirm the product details are correct and click the Submit button. The product will now be included in your listing, and you can choose to include a stock photo (if available) or Additional Product Information from the eBay catalog.
If a product does not exist or the item's unique identifier (ISBN, UPC, IIE, etc.) doesn't match one in eBay's current catalog, you'll still be able list it in the category. These listings will appear on the search results page for that item along with product boxes, but they will not appear on the individual product page.
For more information see eBay's FAQ.