The eBay™* keyword database allows you identify searches performed at eBay.
It provides the ability to find what eBay buyers are looking for, potential opportunities and high conversion keywords for use in PPC campaigns.
The eBay keywords data can show you how frequently, with what search phrase combinations and exactly what ebay customers search for on ebay. Keep in mind that the searches performed on ebay tend to be more consumer oriented, so at the buy now stage of the decision cycle.
For Example: A search for the term "shoes" in the eBay database returns these results: