Walmart has the JVC 58" 4K Flat HDR Ultra HD Smart Television ( LT-58MA887) for $300 with free shipping. Features streaming apps, USB, and three HDMI inputs.
eBay has the Samsung QN65Q9FN 65" Ultra HD 2160p 4K QLED Smart TV (QN65Q9FNAFXZA) for $2099 with free shipping. Features 3840x2160 resolution, UHD upscaling, 240 Motion Rate, Built-in Wi-Fi, 4x HDMI, 3x USB, 4.2-channel speakers.
Has above average Amazon Reviews.
Walmart has the Vizio 65" 4K HDR LED UHD Smart TV (P65-E1) refurbishedM for $699.99 - $7.07 off with in-store pickup discount = $692.92. Features 3840x2160 (4K) native resolution, XHDR Pro with Dolby Vision and HDR10 support, 802.11ac wireless, SmartCast TV with Chromecast (with access to Netflix, Hulu, Amazon Video, more), 5 HDMI inputs & 2 USB ports.