When I was 'negotiating' with pirates in my most recent playthrough, Razor's arguments were for some reason delivered in the form of kicks and punches. Upon inspecting his corpse, I discovered that he had no knives on him at all, which is a little odd for a character notoriously skilled with knives. He even had a sharpening stone, to add insult to injury, so if anyone has seen a sharpened combat knife of ~110q floating around the Black Sea, kindly return it to the corpse of the original owner.
I also checked just in case and the last playthrough in which he fought with a sharpened knife took place in September, 2023, quite a while ago.