Walmart offers the RCA 54.6" 4K 2160p LED-Backlit LCD Ultra HD Television, model no. RTU5540, for $319.99. Opt for in-store pickup to avoid the $44.97 shipping charge. That's $380 off list and a very low price for any 55" 4K television. It features a 3840x2160 (2160p) native resolution, LED backlight, and four HDMI inputs.