Well, alright. [Problem: It's just that easy. Heralia's true alignment is probably chaotic neutral, or would be if she fit so neatly into DnD alignments. She does stand upright, and scan the crowd, looking just as easily casual as if it were all just an accident, and the wonder and awe of someone who had never seen this city. Which, she hadn't, but she's seen better cities overall.] Is switching out prices all you wanna do though? I'm sure this lady has this sort of stuff memorized. I bet you could make it look like she and one of the other merchants are stealing from each other.
marketplace
[You can do better than that is the implication.]