They seem to have reacted very quickly on discount which is offered by Trezor recently, although I expected that the price will go down for this year Black Friday (November 23). In any case this is a good opportunity for those who want to buy a hardware wallet and save 20$ - I do not believe they will offer a lower price in the near future. Although I already have one Nano S, I think it would not be a waste of money to buy another one just in case
I also think that this discount is reaction to Trezor offer. I expected that they will make discount on Black Friday as they did last year, then I got my Nano S. Then it was priced at €55 +€14.50 for shipping. It's great that they're offering free shipping now.