There’s truth in both your response and the post you’re replying to. The seller did take the time to list the relevant information right there on the sign, but he didn’t have to adopt this “OK idiot” attitude when the potential buyer started asking questions; because, while the buyer may be an idiot, there are a lot of idiots in the world, and we should err on the side of empathy instead of judgment. In this scenario, the seller is basically doing the “like I said…” thing that everyone p. much unanimously hates. So, when the buyer asked his dumb questions, the seller should have simply answered them—after all, what is the buyer trying to do, ultimately? He’s trying to sell the product; he should not be trying to correct someone’s mental handicap (however minor or severe), because, if he made that his goal, he’d need the patience of a literal saint and all the time in the universe.