That's totally fair, but the parent mentioned infrastructure costs in response to their posted price. So I don't think bringing up the cost of infrastructure is

That's totally fair, but the parent mentioned infrastructure costs in response to their posted price. So I don't think bringing up the cost of infrastructure is a non-sequitor. OP could have said, "I think that's a fair price when you factor in the costs of operation, my time, and ongoing maintenance," but they didn't which is why I asked a more pointed question.