A free tool that counts visits to your listing
Place an eBay counter like this one in your listing and you'll always know the number of times your it has been viewed by visitors:
About counters from eBay:
Counts visits to your Item Listing page
Available in two viewable designs - or keep your counter hidden
Appears at the bottom of your Item Listing page
About adding/deleting counters:
You add counters in the Sell Your Item form.
You can add or delete counters any time during an auction.