Lone Dog,
Your rifle is very nice and likely has significant value. In order for these
folks to make any appropriate estimates, you will need to provide higher
resolution closeup photographs of following areas of the rifle. Patchbox,
Cheek, Buttplate, Sideplate, Lock, barrel channel, trigger guard, toe plate
ramrod pipes, forestock, signature. I saved these photos and enlarged them, but the resolution will not let me even see the signature. We are
looking for repairwork, missing items, finish etc. Truly, a hands on look
will provide the only accurate information. I would recommend you take
this rifle to an expert for eval.