Abt offers the Samsung 50" 1080p 120Hz LED-Backlit LCD HD Television, model no. UN50H6350, for $647.99 with free shipping. That's the lowest total price we could find by $300, outside of the price below. It features a 1920x1080 (1080p) native resolution, LED backlight, WiFi, USB, SmartTV Internet applications (including Netflix and YouTube), and four HDMI inputs.
Of note, Best Buy offers it for $649.99 with free shipping.