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A Price Comparison Tool lets you track the price of a product across different sources thus helping you to keep informed how’s your competitor is doing. The tool will be printing the product name and price of the site providing the most lucrative offer. For this post, we are comparing the products prices we are getting from Amazon, eBay, and Walmart. The data is in JSON format and we are using lambdas to find the minimum price along with relevant details like product and store name.