Colt has never made a 45/410 pistol
50-400 usd
$50-5000
In their catalog
$8500.00
Depends on which gun. A simple single shot .410 may cost AROUND $150. A collectable Winchester pump, maybe $1,000. A Purdey double .410, about $3,000.
a 410 ga. shotgun pistol was made by crescent firearms and is very rare. however, regular shotguns do not have much value
There are single shots you can get for around 100 dollars
Yes, it is a 410/45LC combo derringer, and runs about $80-$100.
chamber length
100-1000+ depending on specifics
Try Taurus