How much is a ruga 380 worth?

Worst case - federal prison time Best case - 500 USD

100-20000 USD depending on EXACTLY what you have, condition, history, accessories, finish, box, papers, etc..

New, a basic model runs between about $250 and about #325 depending on where you buy it. Used, they usually go for about $200 in good condition.

100-300 or so

I recently saw a used Interarms model in averaqe condition for $420, no case or manual included.