Best Buy has the new Amazon Fire TV Omni Series 65" 4K UHD HDR Smart LED TV (2021 model) on sale for $500 with free shipping. The 75" model) is also on sale for $720.
The Fire TV Omni Series is Amazon's first official line of TVs (not third party) and includes hands-free Alexa voice integration (no remote required). Sizes range from 43" to 75".
The step-down 4-Series TVs require the remote for voice commands and are available in 3 sizes: 43", 50" and 55".