If you’ve been itching to upgrade to 4K, and you aren’t opposed to a refurb, this highly-rated Vizio M-series set is all the way down to $400 today on Woot. That’s $228 less than buying it new from Amazon, where it happens to have a 4.2 star review average. [Refurb VIZIO 50" 4K UHD Full-Array LED Smart TV, $400]

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