Check the acution sites to see if you can find one similar to yours. Based on your description the value could be 10-200.
0-1000 usd
.380 1903
700-1000
Please include the model name to get a correct answer. Colt Pony Pocketlite .380
50-550 usd
100-450 USD
Requires professional appraisal
100-300 USD
50-500 usd
depends on overall condition and date made
Made in 1921. Value range 100-500
value depends on condition