Walmart offers the LG 55" 1080p 120Hz LED-Backlit LCD HD Television, model no. 55LF6000, for $498 with free shipping. Outside of the deal below, that's the lowest total price we could find by $101 and tied with our mention from two weeks ago as the best outright price we've seen. Features include 1920x1080 (1080p) native resolution, 120Hz refresh rate, LED backlight, USB, and two HDMI ports.
Of note, Micro Center offers it for $499.99 with in-store pickup.