DealExtreme - Online shopping for cool gadgets at the right price.
Groupon - Each day Groupon offers a deal through local vendors in your city.
Fasttech - Fasttech is one of the best platforms for buying gadgets and electronics at the best rates.
idealo - Idealo is a free to use mobile application that helps you to find products, compare price and make an informed decision.
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Slickdeals.net - Slickdeals: The Best Deals, Coupons & Discounts on everything