HammerTap is an eBay research tool designed to help eBay sellers. The service consists of a market research tool and webinars to provide sellers with facts based on real eBay historical data.
You can use the HammerTap service to help choose key listing factors such as the best end day for your auction or the most profitable start price to use. In addition, the HammerTap market research tool also provides insight to the main keywords and phrases buyers search with and also recommends which eBay image and listing features to use.