Amazon with Best Buy and Best Buy has the Insignia 55" Class QF Series QLED 4K Ultra HD Smart Fire TV (NS55-UQFL26) for $240 with free shipping. 

The 65" (NS65-UQFL26) is also on sale for $300, while the 75" (NS75-UQFL26) go for $400.

• 3840x2160 resolution, 60Hz refresh rate, HDR 10, Hybrid Log-Gamma
• Built-in WiFi, 3x HDMI, 12W speakers, 400mm x 300mm VESA