Each Ebay listing has a counter that shows how many unique users watched the item
You can either show or hide the views counter in your selling panel
IF item is very popular and a lot of people viewed your listing, ebay starts showing blue pop-ups
which tell others how many people viewed this item per hour / day
The more views you have the more higher ebay rates you.
Try right now ! You can buy views here: http://watcherboost.com/index.php?route=product/category&path=59