An antique "HandMade/HomeMade" gun?
Came across a shotgun tonight that I'm itching to buy. Antique shotgun with a blonde stock. Seller says its a hunting gun from the late 1700 or 1800s (I forget exactly which. I'll have all the information about said gun soon. Now, it is handmade/homemade. No manufacturers mark except for some marks in the stock. How would I go about finding a value on a firearm like this? This is one of those guns that I would love to keep for myself, but am anxious to find the value on.