[lilmule]

While some guns of as little as ten inches were called buntlines by the populous,a true buntline was 12 in barrel with a 16 available and years later way after it was out of use an 18 for a movie for a few dollars more.
A peacemaker normally had a 7 1/2,pic would help but sounds like you have a 9 1/2 in colt,serial number for age of mfg?
Assuming it isnt of modern mfg and a plain jane guess 400-600,1903 colt would be worth more.
Damacas double barrels from 1860 up 100 for a wall hanger to thousands,but the average shooter just never gained a lot in value,a new blackpowder is about same money couple of hundred.More modern ones breechloading still arnt worth a lot as use low power ammo.More modern normal steel barrel is worth more as uses normal ammo.Pics would sure help along with makers names etc,even the names tend to date the firearm.
I have and shoot a db WM Moore and co 12 ga percussion(1860-65),plain jane worth about 200.Just because they are old dont mean they are worth a lot,colts normally bring big bucks but its not a buntline.Buntline 12 in couple thousand,16 in tens of thousands ,18 in you hit the superlotto. That misnomer buntline was applied to all of the long barrels later,but not by the company.1935 and 12 in would be a home run as made way after erp(1848-1929) was in the ground.Was more a product of imagination of a dime novel.
Post some pics ,serial numbers etc some colt expert can then detail it for you.
A model number,serial number which should give date of mfg etc all equal more $.than a 91/2 in colt of unknown model and date of mfg,as it those by which it gains in value,along with condition.Whats top shape mean-like a coin they are graded handle it much its worth less,patena?,percent of original blueing?wear?
Ask me in a bar what id give for a 9 1/2 in colt-400 id be safe not sorry,know the model,serial number etc price doubles or triples,its like asking what is an 1910 us coin worth,what denomination,what mint,what grade.