If you're a manufacturer, and you want to showcase your product in a store that has a narrow but deep selection of merchandise and where expert sales associates can assist customers with their selections, you'd most likely choose a(n)

specialty store

Explanation:

Based on the scenario being described within the question it can be said that for this you would most likely choose a specialty store. This refers to a retail business that focuses on very unique and specific product categories, in which everything revolves around that category. This category may be unique but offer a wide variety of product offering within it.

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