Sam's Club offers its members the Sanyo 50" 600Hz 720p Widescreen Plasma HD Television, model no. DP50740, for $398 with free shipping. (Non-members pay $39.80 more.) That's the lowest total price we've seen for a 50" plasma HDTV by $31. Sales tax is added where applicable. It features a 1024x768 (720p) native resolution, 60Hz refresh rate, USB input, three HDMI inputs, and other audio and video inputs.