For its members only, Sam's Club offers the Vizio 55" 1080p 240Hz WiFi LED-Backlit LCD Smart HD Television for $678 with free shipping. (Non-members can purchase a 1-year membership for $45, rather than pay the $67.80 non-member fee.) Outside of the mention below, that's the lowest total price we could find by $120 and the best outright price we've seen. (We saw it bundled with a $200 Dell gift card for $122 more three days ago.) It features a 1920x1080 (1080p) native resolution, 240Hz refresh rate, LED backlight, WiFi, VIZIO Internet Apps with Netflix, Amazon Instant Video, and Hulu Plus, and four HDMI inputs.
Not a member? Dell Home has it for $697.99 with free shipping.