On Google Base on the right it will say one item at a time.After you choose that it will have a list like personals,wanted,just a list of catorgories to place your item.Don't choose those.Below the list is an empty box.Write your own content here.If your selling computers,put something like dicount computers.And it will take you to your next page creating your listing.Use the html and the tools they have to create your listing.At the very bottom of your listing(make sure your out of html)Put all these keywords in your listing.Just copy and paste them.I'm going to try to find a way to edit the html to use meta tags and keywrds on base.Now your listing is done and never expires.