PriceCute - Keep up with your competition's pricing on Amazon
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Camelcamelcamel - Easily monitor Amazon product prices and get alerts when they drop.
Pricing API for Walmart - Access on-demand pricing data for 20 million+ products on Walmart.com.
GlassIt.co - Find discounts, without invasion of your privacy. Download Glass It Price Tracker mobile app or browser extension 🇺🇸
Cross - Find the best Amazon price in the world