Impossible to answer without a detailed description and the serial number.
0-800 usd
50-500 usd
50-500 usd
-40 - 400 usd
50-375 usd
38 special
Maybe. You need to figure out which .38 your Colt is chambered in. .38 Short Colt and .38 Long Colt guns will not chamber a .38 Special. .38 Colt Special is the same as regular .38 Special. If you cannot tell which caliber it is you need to take it to a gunsmith and have him tell you.
colt 38 special
50-200
100-1000 or more depending on specifics
Your Colt Trooper .38 special CTG # 68404 was produced around 1968. made 1968. value depends on condition
The .38 Short Colt catridge may be safely fired in a .38 Special revolver. Not ALL 38 Colts- .38 Short Colt.