Walmart has the Sharp 43" 1080p LED LCD Smart TV (LC-43P5000U) for $200 with free shipping. List price: $320. Features 1920x1080 (1080p) native resolution, 802.11n wireless, Smart TV apps, USB, and three HDMI inputs.
Amazon has the Sony KD55X720E 55" 4K UHD HDR Smart LED HDTV (2017) for $598 with free shipping. List price: $800. Features 3840 x 2160 (4K UHD), HDR10-compatible, 60Hz refresh rate, Built-in Wi-Fi, Ethernet, Dolby Digital/DTS, 3 x HDMI, 3 x USB.
Has good Amazon Reviews.
Walmart has the JVC 49" 4K UHD Smart TV w/ Chromecast (LT-49MA875) for $250 with free shipping. It features a 3840x2160 (4K) native resolution, 802.11ac wireless & Bluetooth 4.2, built-in Chromecast (with access to Netflix, YouTube, Hulu, more), 3 HDMI inputs, USB 2.0.
Walmart has the Samsung 55" 4K UHD HDR Smart LED TV (UN55MU800DFXZA / UN55MU8000FXZA, 55" 2017 model) refurbished for $450 + $20 shipping fee = $470 shipped. Features 3840 x 2160, HDR10 support, Motion Rate 120, Built-in Wi-Fi, Samsung Smart Hub, 4 x HDMI, 3 x USB.