I'm pretty sure you mean the Colt Single Action Army or Peacemaker on the civilian market. Colt made a version of this gun with a 4 1/2 inch barrel, this was the "gunslinger" model.
A new Peacemaker goes for about $1,300. You'd have to talk to a gun dealer or collector to find the value of yours. Age could work in your favor for resale. But age, how well it's been kept, how many bullets you've put through it will affect your price.
Colt has never made a 45/410 pistol
the 45. colt combat commander i worth from 1100.00 to 9000.00 depending on the gun research carefully.
If you call Colt they will tell you when it was made.
Proofhouse.com has Colt sn data.
You will have to call Colt.
You must call Colt to find out.
50-500 usd
Proofhouse.com has Colt sn tables.
100-500 USD
Priceless!
made about 1970
$650 to 750