It would be worth between $325 - $400. It was made between 1964-1979.
By the serial number I would say that this is a satin nickel government model, series 70 semiauto. Condition is everything. Take it to a reputable gun shop, pawn dealer or gunsmith and ask them. The closer something is to new in the box (NIB) the more it is worth.
Which one?
For which pistol??
it is worth about £278/$313.
20
is about 100.00
More information is needed to identify the manufacturer of this pistol.
Colt has never made a 45/410 pistol
A Colt 22 target pistol can be worth anywhere from 100 to 500 dollars. This all depends on what shape the gun is in.
To get an answer you will have to state the condition of the pistol & is it still working?
$250