Walmart offers the Samsung 51" 600Hz 720p Plasma HD Television, model no. PN51F4500BFXZA, for $348. (This price appears at checkout.) Opt for in-store pickup to dodge the $44.97 shipping fee. That's tied with last week's mention and the lowest price we've seen. (It's also a current low by $50; most retailers charge $590 or more.) It features a native resolution of 1024x600, 600Hz subfield motion, USB, and two HDMI inputs.

Update: It's now available for in-store pickup only.