It looks like the sale only applies to the old HDMI 2.0 cables. The new and improved HDMI 2.1 cables (backward compatible) are capable of 48Gbps, not discounted.
The AudioQuest Pearl is the least expensive 48Gbps cable HDMI cable. Notice that it’s listed under the full retail price.
https://www.bestbuy.com/site/audioquest-pearl-5-4k-8k-10k-48gbps-in-wall-hdmi-cable-black-white/6428744.p?skuId=6428744
https://hdmi.org/spec21sub/ultrahighspeedcable
The AudioQuest Pearl is the least expensive 48Gbps cable HDMI cable. Notice that it’s listed under the full retail price.
https://www.bestbuy.com/site/audioquest-pearl-5-4k-8k-10k-48gbps-in-wall-hdmi-cable-black-white/6428744.p?skuId=6428744
https://hdmi.org/spec21sub/ultrahighspeedcable