Walmart has the Vizio D55x-G1 55" 4K UHD HDR Smart LED TV (2018) for $300 with free shipping. List price: $478. Features 3840 x 2160 (4K UHD), 60Hz refresh rate, built-in chromecast, built-in Wi-Fi, google assistant and Amazon Alexa Control, 3 x HDMI.
Walmart has the TCL 55" Class 4K UHD (2160p) Dolby Vision HDR Roku Smart TV (55R615) for $378 - $4 off with free pickup option = $374 with free in-store pickup. Features 3840 x 2160, 60Hz native refresh rate, HDR 10, HLG, Dolby Vision HDR, 120 LED zones (12,667:1 contrast ratio), 3 x HDMI 2.0 with HDCP 2.2.
Walmart has the RCA 43" Class 4K Ultra HD (2160P) LED TV (RTU4300) for $150 with free shipping. Features a 3840x2160 (4K) native resolution and four HDMI inputs.
Walmart has the Vizio D-Series 65" 4K HDR Flat Smart Ultra HD Television (D65X-G1) for $480 with free shipping. Features 3840x2160 (4K) native resoltion, Chromecast streaming apps, USB, 3 HDMI ports.
Also get the 55" model (D55x-G1) for $300 and 50" model (D50x-G9) for $260 with free shipping.