He was originally quoted $300 for the tube repair (or maybe $299), plus shipping. [His original post is here.]
The situation isn’t that he sent it back without knowing the cost. He was quoted a cost and given a bill for more after the fact with no explanation of what the extra costs were. I can’t imagine any consumer being OK with this. Now, obviously we are only getting one side of the story, but it’s at the very least past the part where we debate what it should cost.