Just got my Costco coupon book for February. Item # 9950403, which is the same as the TCL 55S405, will be $350 starting 2/8. Not as slick as the $315 target price on black Friday, but the extra $35 will get you Costco’s 2 yr warranty.
Note, not online yet as of 2/1/17
Ad scan here : https://imgur.com/a/9zb3e