Amazon.com offers the TCL 50" 4K2K 2160p LED LCD HD Television, model no. LE50UHDE5691, for $555.49 with free shipping. That's $72 under our April mention and the lowest total price we've seen. (It's a current low of $45.) It features a 3840x2160 resolution — four times that of 1080p TVs. It also has a 120Hz refresh rate, LED backlight, and four HDMI ports.

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