A free tool that counts visits to your listing
If you place an eBay counter in your listing, you'll always know the number of times it has been viewed by visitors. A counter can help you determine how interested buyers are in your item.
Here's a sample counter from a page viewed 359 times:

The eBay counters:
Are available in three styles: basic, retro-computer and hidden.
Appear at the bottom of your listing page
Can be hidden from visitors
More about hidden counters:
Visitors to your listing don't see the number of visits.
The number count is visible to you when you are signed in as the seller.
In place of a counter, visitors see this graphic on your listing page:

Adding eBay counters
To add a counter to your listing, select the counter you'd like in the Visitor counter section of the Sell Your Item form.