The amount of money it cost both you and him is trivial compared to a reputation as someone who deals fairly and stands square to try and resolve problems amicably.
I'd give him the money back and, only after that, say anything about what might have gone wrong.
dr del
I don't know, when someone screws up due to their own ignorance and ineptitude, I leave that on them. That was just stupid to think you could transport an animal that way, especially one with no personal control over its bodily temperature. Sucks for the snake though.