Here is a link to an automatic guitar playing machine that was built by
the graduate class in Mechatronics at Georgia Tech.  There are photos,
sound clips, etc.  Quite interesting:

http://www.me.gatech.edu/mechatronics_lab/Projects/Fall00/group3/contents.htm 

This group could likely sell some of these to collectors.  Count me in.

Bruce Miller
Issaquah, Washington