Walmart offers the RCA 65" 4K HDR LED-Backlit LCD Ultra HD Roku Smart Television, model no. RTRU6527-W, for $599.99 with free shipping. That's $144 off and the lowest price we could find. It features a 3840x2160 (4K, 2160p) native resolution, HDR 10, full-array LED backlight, WiFi, integrated Roku TV (with access to Netflix, Youtube, Hulu Plus, more), and four HDMI inputs.

Update: The price has dropped to $589.99.