Miracle Piano NES Cart

I found one in my grandparent's attic. Is it worth anything? I heard that the cart was rare. The cart still has its case.

 

too help find your that answer, it would be better if you asked questions like this, in this thread ==>http://www.assemblergames.com/forums/showthread.php?t=19495

But to give you answer since you already made this thread here:

In 2007 it sold in the $100-150 area. That was with the extension. With just the cart i am not sure.
One thing i know for sure is that the NES version is a bit rare compared to the genesis

 

I also have the connector, it's still bubblewrapped. The piano is broken though

 

You need the whole thing, boxed and working, really. Piano might be fixable, depends what's wrong with it.

Do go and read the rules, though - there's a place to ask for values, and this isn't it.