Walmart has the Vizio 50" 4K HDR UHD Smart TV (D50x-G9) 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 Onn TV Wall Mount for 10" to 50" TVs (ONA16TM011E) for $12.98 + $5.99 shipping fee = $18.97 shipped. List price: $79. It holds up to 66 lbs. and comes with a 6-foot HDMI cable.
Amazon has the LG Electronics 65UK6300PUE 65" 4K Ultra HD Smart TV (2018 model) for $617 with free shipping. Retail price: $897. Features 3840 x 2160p (4K UHD), HDR compatible, TruMotion 120, Quad-core processor, 20W speaker system, 3 x HDMI inputs.
eBay has the LG OLED65C8P 65" 4K UHD HDR Smart OLED TV (model 2018) for $1799 with free shipping. Features 3840 x 2160 (4K UHD), OLED panel, HDR10, HLG, Dolby Vision support, Google Assistant & Amazon Alexa support, Dolby Atmos, Wi-Fi, 4 x HDMI.