One person told me that the reason why many black businesses charge a little bit higher is because unlike mainstream retail/grocery stores (who make millions within a month), black businesses don't have the same wealth to reorder stock/merchandise if they're charging extremely less.
See the big name retailers/grocery stores can afford to constantly & consistently have sales every other week, month or year. Basically if local black businesses were to sell products for extremely low prices how Walmart, Target, dollar stores (just to name a few) are able to regularly, they might not be able to continue having a store let alone the pay for the space they're renting.