One day sale on Saturday. New 2017 model. Didn't see a single deal post about this model yet, so it may be the first sale.
Price is currently $978 but the sale takes $200 off. I attached the ad. Sales starts at 12:01 EST online and at 7am in the stores.
Flat version (UN55MU630D) also available for $678 ($100 off). Good deal, but I prefer curved.