J.Lee.Harold

Hi everyone, I'm new to the forum...I saw Tool perform in April 1992 opening for rollins band at CBGB NYC. I also saw them later that same week at a small club in Newark NJ called the Pipeline. That week I purchased the demo tape, which I still own. I have received a few offers lately and have passed on them because from what I understand this demo is somewhat rare. Does anyone have any insight as far a fair value for this demo? Its in very good shape, both the cassette and the insert. Any feedback would be greatly appreciated. Thanks...J-