Walmart offers the refurbished Panasonic VIERA 50" 600Hz 720p Plasma HD Television, model no. TC-P50X5, for $399.98 with free shipping. That's tied with our mention from last week as the lowest total price we've seen for this model. (It's also $140 under the best price we could find for another refurb.) It features a 1024x768 (720p) native resolution, 600Hz sub-field drive, USB, and two HDMI inputs.
Amazon offers its Prime members the Panasonic Touchpen, model no. TY-TP10U, for $24.99 with free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping adds $5.74.) That's the lowest total price we could find by $35. This device turns your Panasonic 2013 ZT60, ST60, or VT60 Plasma TV into a virtual whiteboard.