Best Buy offers the Samsung 40" 4K 2160p WiFi LED-Backlit LCD HDR Ultra HD Smart Television, model no. UN40KU6290FXZA, for $297.99 with free shipping. Excluding the mention below, that's the lowest total price we could find by $220, although we saw it for $10 less during Black Friday week. It features a 3840x2160 (4K 2160p) native resolution, high dynamic range (HDR), LED backlight, quad-core processor, Smart TV apps (with access to Netflix, YouTube, Hulu, etc.), USB, and three HDMI inputs
A close price: Best Buy has it for $299.99 with free shipping.