What is the value of a36cal H and A underhammer muzzle loader?

The value of a .36 caliber H&A (Harmonica & Adams) underhammer muzzleloader can vary significantly based on its condition, rarity, and historical significance. Generally, such firearms can range from a few hundred to over a thousand dollars. Factors such as original features, craftsmanship, and provenance also play a crucial role in determining its market value. To get an accurate estimate, it's advisable to consult recent sales or an expert in antique firearms.