The best way to determine actual value is to search the on-line auctions, such as www.gunbroker.com and www.auctionarms.com or even www.proxibid.com enter your details in the search and see what is selling and for how much. You can also search the archives and or sold items to get an idea of what your gun is selling for. Another place to look is The blue book of modern black powder gun values, available from www.midwayusa.com as well as many of the other hunting and firearm stores. That will give you an idea of the general value. Guns tend to have some regional value too, say a Thompson Center Seneca may be worth a bit more in the north east than in the mid west. Don't forget condition has allot to do with value, so compare apples to apples.
100-400 USD
what is the age of a .36 cal pedersoli black powder rifle serial number da89669
There is a strong likelihood that it does not have one. Serial numbers were not required by law on rifles and shotguns until 1968. If the shotgun is a muzzle loader that uses loose powder and shot, it is considered an antique firearm under Federal law, and is not required to have a serial number.
Mine is on left side by site on barrow
You must take it to a gunsmith to find out.
10-100 usd
20-300 usd
50-100 USD
100 or so
50-300 usd
10-100 usd
50-275 USd