Well, the Wayback Machine saved the page of Century 21's return policy for 11 September 2020, and it is as I remember it, and does not say all sales are final.

Also, the sales rep had clearly been instructed to say there is a "banner" on the site saying all sales are final. Looking at the site today:

* I could find nothing on the front page saying anything about sales being final, just about sales going on at retail stores and not online.
* On the returns page, it does (now -- not as of when we shopped) say all sales are final, and in large letters (though I don't think it constitutes a "banner", but okay). I don't recall how I got to that page, as there's no obvious link to it from the front page.

I'll screenshot the Wayback Machine's info, as I expect I'll have to dispute the charge.
This account has disabled anonymous posting.
If you don't have an account you can create one now.
HTML doesn't work in the subject.
More info about formatting
.