Update [11/18]: Sold out at Amazon, but on sale at Best Buy. 

Amazon has the Hisense R6 Series 4K Ultra HD 55" Roku Smart TV (55R6G) for $240 with free shipping.

• 3840x2160 resolution, Motion Rate 120, Dolby Vision HDR, HDR10, HLG
• Built-in WiFi, 3x HDMI, 8W speakers, 200 x 300 mm VESA, 4K upscaling