Amazon has the TCL Q65 QLED 65" 4K UHD Smart TV with Google TV (65Q651G) for $400 with free shipping. Same price at Best Buy.

The 55" is also on sale for $300 (Amazon or Best Buy). 

• 3840x2160 resolution, 60Hz refresh rate, 240 motion rate, AMD Adaptive Sync
• Built-in WiFi, BT 5.0, 3x HDMI, 2x USB, Dolby Vision, HDR 10, HDR 10+, HLG