Is the NAMM show closed to the general public? Can someone buy a badge(or whatsoever) at the door? Is the Musikmesse in Frankfurt open to general public? Can you buy things at those shows? If so, are they cheaper than stores? Because when I dream a musical instruments and parts fair, I think it's full of big companies that you can go, check, play and buy cheaper. Are there other fairs/shows that you know?