Walmart offers the Hisense 55" 1080p WiFi LED-Backlit LCD HD Smart Television, model no. 55H5C, for $380.10 with free shipping. That's the lowest price we could find by $50. It features a native resolution of 1920x1080 (1080p), LED backlight, WiFi, Smart TV apps (Netflix, Pandora, etc.), and three HDMI inputs.

Update: The price has increased to $389.96.