I've been buying the big price drops on Amazon and selling them at a decent profit on eBay and other marketplaces almost daily with great success for a while now. Most of the price drops I pick up are the results of Amazon's algorithmic pricing changes and oft-times disappear just as quickly as they appear. So it is important that I can identify them on autopilot and buy before they are out of stock or the price is reversed. (which happens a lot) I then wait to take stock of the item, list them on eBay and they usually sell quite quickly and always for a profit. I have made the tool publicly available for use free so check it out here and please do tell me your thoughts. All feedback and suggestions are most welcome. There are some very interesting expansion plans to further increase the utility of the site in the coming days and your opinions would help shape the experience greatly.