Percussion cap ignition in muzzle loading firearms was introduced around 1830.
Reference books, experience
50-450 usd
100-450 USD
the first projectile was a muzzle loader ball discovered in 1812 and it was a 68 caliber ball
http://www.michigan.org/Things-to-Do/Outdoors/Hunting/Default.aspx
The value varies by condition and seller between $150 and $800.
100-300 USD
50-350 usd
The value of a .45 caliber muzzle loader made by Richland Arms Co. varies with the condition of the gun. On average, this gun retails for about 150 to about 200 dollars.
Internet auctions, want ads, gun shows.
The model 200 was introduced in 1928 and was a .175 caliber BB muzzle loader.