Walmart has the Samsung 6-Series 50" 50NU6900 4K Smart LED HDTV (UN50NU6900) for $378 with free shipping. List price: $600. Features 3840x2160 4K LED TV, 120Hz effective refresh rate, 2x HDMI, 1x USB ports.
Walmart has the Vizio D50x-G9 50" 4K UltraHD HDR Smart LED HDTV w/ Voice Remote & Chromecast for $298 with free shipping. List price: $428. Features 3840x2160 (4K) native resolution, Dolby Vision HDR (with support for HDR10 & HLG), 802.11ac wireless, USB port & 3 HDMI inputs
Walmart has the Sceptre 23.6" 1080p Flat LED HD Television (E246BV-F) for $90 with free shipping. Features a 1920x1080 (1080p) resolution, USB 2.0 port, and HDMI input.