Walmart offers the refurbished Samsung 51" 720p 600Hz Widescreen Plasma HD Television, model no. PN51D450, for $399.88. Choose free Site-to-Store pickup to avoid the $49.97 shipping cost. That's $220 under the lowest price we could find for a new one. Sales tax is added where applicable. Features include 1360x768 (720p) native resolution, 600Hz refresh rate, .001 ms response time, USB connectivity, two HDMI inputs, and VGA and other inputs.

Of note, a 90-day warranty applies, however it's unclear who supports it.