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.
The value of a Thompson Center Arms 50 cal muzzel loader K7846 is about $500.
The value of a Thompson 50 cal muzzel loader K7846 is about $400.
$400 is the value of the Thompson Muzzel Loader 50 ca K7846.