The majority of time I am hunting for a good price the Invisible Hand extension takes me to Amazon as having the best price. Some few times it tells me that the

The majority of time I am hunting for a good price the Invisible Hand extension takes me to Amazon as having the best price. Some few times it tells me that the item is maybe 1% to 5% cheaper in Ebay (the last place I would buy from). So in a pragmatic way (considering all the potential risks and waste of time/money) Amazon seems really to be the cheapest possible way.