It is £50 off on the Bose website today, so the "Bose price" is NOT what QVC are claiming.
CORRECTION (sort of) - The headline price is £500, which is the normal Bose price (actually £499-99). But it has been reduced by Bose by £50 for Black Friday, and in the description it does quote that price, not the higher price.
I've just watched the video, where they do mention that it is currently reduced on the Bose website, but you are still saving £100 if you get it from Q.
There are various other anomalies in the description, eg battery life of 8 hours, but it is NOT battery. And no setup required, it works straight from the box, but NOT the clock, you have to do this manually (unless they have altered it compared with mine)