Most of the value will depend on the overall condition that the firearm is in. There are also variances of value by region and demand where the firearm is located. As a working figure if your Renegade in in good or better condition it should be worth about $175-$250.
50-300 USD or so
The value of a Thompson 50 cal muzzel loader K7846 is about $400.
50- 250 usd
Value will depend on the exact model, Interest in the traditional style muzzle loaders seems to have dropped in favor of the in-line 209 primed rifles. Figure about $250-300. I have a TC Renegade in .50 cal- great shooting rifles.
If you mean the Thompson Center muzzle loading rifle, contact TC customer service through their webiste at tcarms.
100-400 usd
what is the value of a Thompson grey hawk 50 cal. from the custom shop with walnut stock
About tree fiddy
New? $300.
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.
Unfortunately, T/C had a large fire that destoyed most of their production records, and that information is simply not available. I have one in .50 cal, and it is a great rifle.
To find out the age and value of a 50 cal Thompson Center Thunderhawk one will need to call the maker or take the gun to a dealer. You can even call a dealer and give them the serial number 20752 and they may be able to look it up.