Anybody knows how much its worth?

I have this Joseph M. Schenck, Presents Walt Disney Mickey Mouse "Mickeys Nightmare" United Artist Picture. It is Glass Mirror Picture. I believed it is in original steel frame and in great condition. The back has the numbers and details. I don't know how much this worth and been trying to find online the answers but there is nothing I could find. I found similar but it's different title. Anybody here knows about this?. I hope somebody would help me figure out how much this worth. Thanks all.