Samsung's QLED 4K TVs are the best it has to offer, delivering more vibrant, vivid visuals than its run-of-the-mill LED 4K TVs. But this level of viewing doesn't come cheap. Take the 55-inch Samsung Q90R, for example. Usually $1,200, the QLED 4K TV is on sale now at Walmart for just $900 — $300 off.