Using My eBay for Guests
As a registered member of eBay, you can save your searches, sign up to receive email alerts when new items from your saved searches are listed, and track and manage all of your eBay activities from one place — My eBay.
If, however, you haven't registered yet, you cannot use My eBay to keep track of items in a Watch List.
As a registered user, you can watch up to 100 items.
To manage watched items as a guest:
Add an item to your Watching list by clicking the Watch this item link on any item page.
View the list of items you’re watching by clicking the My eBay button at the top of most pages.
Bid on an item in your watch list by clicking the Bid Now button.
Delete an item from your Items I'm Watching list by selecting the check box next to the item, then clicking the Delete button.