Here's an interesting one.  Ken Babbs' (of Kesey's Pranksters) son is selling an old amp that Jerry used backstage.
 
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&ih=005&sspagename=STRK%3AMEWA%3AIT&viewitem=&item=150092215967&rd=1&rd=1
 
Bill, tgo

When I was still living in the Central Valley a guitarist I use to do pickup gigs with used one of these.  
 
Keith

Did he have a beard and a missing right middle finger?
 
Bill, tgo

The sound file alone would put me off a bid even if i did care about the ownership..

Bill,
No all of his digits were intact and facial hair was limited to a mustache.  
 
Keith