Sam’s Club has 55" Hitachi 55L6 4K UHD LED HDTV on sale for $348.
Shipping is free.
http://www.samsclub.co
Note: Non-members may purchase, but will be subject to a 10% surcharge.
Specs
Resolution: 3840×2160
Refresh Rate: 120 Backlight Frequency
Inputs:
4x HDMI