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10-10000 USD depending on specifics.
Blue Book of Gun Values will help.
A few hundred to tens of thousands of USD depending on EXACTLY what you have.
A Colt single action 1860 army with that serial number was made in 1866.
100-1000 usd
Your colt single action army dates to 1881 with the serial number you provided.
If it is Colt single action army, then it was made in 1889.
eBay
If this is a Colt single action army, it was made in 1874.
Look on the frame
My records indicate that your 45 colt single action army was made in 1883.
1970