Based on what he said, it appears he didn't pay anything for the tubes. So in his case, all he's lost is the expected tubes. He said four were shipped and two were damaged? Then he still has two good ones. What do you expect for nothing? Rubber biscuit?
The sender is the one who lost most in this case. If he were willing to give them away, I imagine it isn't a huge loss for him, either.
It's a shame that two good tubes were destroyed, though.