Walmart has the Hisense 4K UHD HDR Roku Smart LED HDTV (65R6E) for $498 with free shipping. List price: $648. Features 65" 3840x2160 4K UHD LED display, HDR; Motion Rate 120, Built-in WiFi, Roku for 500,000+ streaming movies & TV episodes.
Amazon has the Insignia 43" 4K HDR LED UHD Smart Fire TV (NS-43DF710NA19) for $200 with free shipping. List price: $300. Features 3840x2160 (2160p) native resolution, Fire TV apps, Alexa voice control, 3 HDMI ports, 1 USB port.
Has good Amazon Reviews.