The value of ANY gun is based on make, model, and condition, You gave us none of the 3, so there is no way to answer your question. If you can repost with that information, we'll try to help. Some are worth $10, some $250.
10-100 usd
$75
25-100 or so
50-100 or so
25-75 USD
0-50 USD depending on condition, box, accessories, etc..
22 cal. dillenger worth
10-50 usd
20-80 usd
10-60 usd
50 or so
No way to tell based on your description.