Vann's offers the Samsung 55" 120Hz 1080p Widescreen LED-Backlit LCD HD Television
, model no. UN55D6005, together with the Samsung LinkStick Wireless USB Adapter
with free shipping
. That's tied with a mention below as the lowest total price we've seen for a Samsung 55" 120Hz LED TV with WiFi connectivity. It features a native resolution of 1920x1080 (1080p), 120Hz refresh rate, LED backlighting, WiFi connectivity via the included LinkStick, two HDMI inputs, and other video inputs.
A close price is TigerDirect's $1,249.99 with free shipping.
Update: This model is 120Hz, not 240Hz as originally described.