Mercantile douche

[Kit]

A person who is incredibly annoying as a salesperson, clerk, or bartender. Someone who is a douche about how much they are charging for something.
Charging a lot of money for something is not what qualifies an individual as a [mercantile douche]. The individual must get upset and defensive when you challenge or [inquire] about the pricing schedule of their product. Basically they will be a dick when you ask about the price of something, and act like they are personally offended by your question. This description of an individual is especially [poignant] when the individual that is acting as a mercantile douche is not the individual who sets the prices or actually receives increased revenue from the pricing schedule.