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.
I found a used Richland Arms 45 cal muzzle loader today. The gun shop had it for sale at $225. I almost bought it but I know nothing about the Mfgr. On the barrel was stamped "Made in Italy" and Blissfield Michigan. Hope this helps.
100-400 or so
You need the services of a gunsmith
While these are very well made firearms, the value of the traditional sidelock rifles has decreased as in-line muzzle loaders have become more popular. These can be found in very good condition for about $250. I shoot a T-C Hawken in 50 cal, and it is an excellent rifle.
100-500 USD
100-400 USD
50-350 usd
Seldom exceed 100 USD
350 to 650 dependng on condition.
10-100 usd
@100 USD depending on condition
Check the on line auction sites.