Stephanie is well-versed enough in the art of haggling to believe both that the blacksmith is trying to charge far more and that Eskel is trying to pay far less than what the supplies are worth, but she's also aware that Eskel doesn't have a lot of bargaining power here. Despite the fact that if the blacksmith doesn't sell to him, he might not be able to unload those supplies, his prejudice is making that seem like an outcome he's willing to risk.

But, because she did sort-of promise to hold her tongue, she satisfies herself with just hovering over his shoulder and glaring at the short, red-faced man and hoping that her presence will be unsettling enough that this won't take all day.

When Eskel finally capitulates, she can feel her frown deepening, so much so that she knows she's scowling when he turns back to her and holds out one of his current burdens so he can accept even more.

She does, at least, bite her tongue in front of their audience, though.