I have an original painting from DeeDee Ramone thats in gr8 condition, about how much do u think its worth?

It was given to my mom's friend and now it's mine my hands. I don't plan on selling it, but I'm just curious to see how much its worth. It's a portrait of Sid Vicious. I don't know what year it was made, but it is from DeeDee Ramone of The Ramones (my mom's friend was good friends with him back in the day) and it's in excellent condition. How much would a piece like this be worth?