Walmart offers the Hisense 54.6" 4K HDR LED-Backlit LCD Ultra HD Smart Television, model no. 55H6D, for $348 with free shipping. That's $50 under our December mention (which also required in-store pickup), $120 off, and the lowest price we've seen. It features a 3840x2160 (4K) native resolution, full-array LED backlight, 4K upscaling, dual-band WiFi, Smart TV apps (including Netflix and YouTube), three USB inputs, and four HDMI inputs.

Update: It's now available for in-store pickup only.