How much could you get for a Diamond Arms St. Louis 410 gauge single shot?

The value of a Diamond Arms St. Louis 410 gauge single shot shotgun typically ranges from $200 to $600, depending on its condition, age, and any unique features it may have. Factors such as historical significance and market demand can also influence the price. For an accurate appraisal, it's best to consult a firearms expert or check recent sales of similar models.