Walmart offers the Proscan 55" 4K 2160p LED-Backlit LCD Ultra HD Television, model no. PLDED5515-UHD, for $279.99 with free shipping. That's tied with our June mention as not only the best price we've seen for this TV but also among the least expensive new 55" 4K UHD TVs we've ever seen. (It's the best deal for this model today by $293.) It features a 3840x2160 (4K, 2160p) native resolution, USB, and three HDMI inputs.