ebay via buydig has a LG 55UJ7700 55" 4K HDR Smart HDTV (2017) for $449 with free shipping.

• 3840 x 2160 IPS LED Panel
• 120Hz effective refresh rate
• Available 4 x HDMI / 2 x USB

Amazon is taking an Extra 20% off Select Warehouse Deals with the discount shown at final checkout, and get free shipping.

• Good on items shipped and sold by Amazon Warehouse Deals
• These are all Open-box and used items

BHphotovideo.com is selling the Samsung MU6290-Series 40"-Class HDR UHD Smart LED TV for $327.99 with free shipping.

• UHD 3840 x 2160 LED Panel
• HDR10 Support
• Motion Rate 120 for Reduced Motion Blur
• Screen Mirroring Technology

Walmart.com has a Sceptre U650CV 65" 4K UHD LED HDTV for $449.99 with free shipping.

• 3840 x 2160p, 60Hz refresh, 250cd/m2 brightness
• 178° viewing angle, 4 x HDMI
• $569 at Amazon

Ends 11/12.Sam's Club has a Vizio E55-E1 55" 4K UHD SmartCast Display E55-E1 for (2016 model) for $398 + 10% nonmember surcharge = $438 with free shipping.You might be better off to buying a membership if you don't have one ($45; choose "Join now" in cart).

• 3840x2160 (4K UHD), 120Hz native refresh rate, 12 Active LED Zones
• Full-array LED backligh, built-in Google ChromeCast, 4 x HDMI