This task can be performed using DealDrop: Coupons & Price Comparison
Real Time Product Price Comparison and Coupons
Best product for this task

DealDrop: Coupons & Price Comparison
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DealDrop is a Chrome extension that transforms online shopping by automatically comparing prices and applying coupons across over 200,000 global retailers. Simply visit any product page to try it out.

What to expect from an ideal product
- Automatically compares prices from thousands of stores so you can find the best deal
- Applies coupons directly at checkout to ensure you save money without any extra effort
- Works seamlessly on over 200,000 online retailers, giving you a wide variety of choices
- Instantly notifies you of price drops on products you're interested in buying
- Easily integrates with your Chrome browser, making it simple and convenient to use while shopping