Amazon offers its Prime members the Vizio 50" 4K 2160p WiFi LED-Backlit LCD Ultra HD Smart Television model no. M50-C1, for $628. At checkout, it drops to $598. With free shipping, that's $30 below our mention from earlier today and the lowest outright price we've seen. (Outside of the prices below, it's a current low by $30, although some stores charge over $700.) It features a 3840x2160 (2160p) native resolution, Smart TV (with access to Netflix, Hulu Plus, Pandora, and other Vizio Internet apps), USB, and five HDMI inputs.

Of note, for their members, Sam's Club also offers it for $598, and Costco offers it for $598.99, each with free shipping.