In celebration of March Madness, Vizio is running some promotions on TVs for the entire month. While there are deals on TVs of all sizes, one of the best deals is $300 off a 75-inch 4K Ultra HD Smart TV at Best Buy . You'll also find more deals at Walmart and Target. Whether you need a big screen for watching college basketball or you're just due for an upgrade, this is a good time to save. For more deals and promotions at these three retailers (and more), visit Business Insider Coupons .
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