Keystone is the first hardware wallet brand whose Black Friday deals I have come across. There is a 20% discount for all purchases across their shop. To get it, you don't need to enter any discount codes. The Keystone 3 Pro is now $119.20 instead of $149. Use promo code "BFFORX" to get another 10% off. The Keystone 3 Pro will then cost you $107.28. Pretty good deal if you are considering purchasing this hardware wallet.