Walmart has the Proscan 55" 4K 2160p LED LCD UHD TV (PLDED5515-UHD) for $280 with free shipping. List price: $500. Features 3840 x 2160 Ultra HD resolution (4K x 2K), built-in digital tuner, USB, 3 HDMI Inputs.
Walmart has the Vizio 65" 4K HDR UHD Smart TV (M65-D0) refurbished for $800 with free shipping. List price: $1500. Features 3840x2160 (4K, 2160p) native resolution, 4K upscaling, Google Cast (with access to Netflix, Hulu Plus, Amazon Video), 5 HDMI inputs (2 side, 3 down), 1 (side) compomnent, 2 (side) USB ports.
eBay has the LG 65UJ6300 65" Super UHD 4K HDR Smart LED TV (2017 Model) for $849 with free shipping. Retail price: $1397. The discounted price is reflected in cart. Features 3840 x 2160 (4K UHD), 60Hz native (TruMotion 120), HDR10 compatible, Built-in Wi-Fi, Ethernet, DTS-HD, IPS LED panel, WebOS 3.5, 3 x HDMI.
Has good Amazon Reviews.