Walmart offers the Samsung 51" 600Hz 720p Plasma HD Television, model no. PN51F4500AFXZA, for $427 with free shipping. (Best Buy, Abt, and several other merchants charge with $3 of this price.) That's $23 under our August mention and the lowest total price we've seen. (It's a current price low by $122.) Features include 1366x768 (720p) resolution, 600Hz refresh rate, USB connectivity, and two HDMI inputs.