I moved into a new house and found a Butler 65 Head , I dont play , and I need to know if its worth anything from what I have seen so far this 76 year old guy builds amps and has only built 350 to 400 amps his whole life , I guess they make great sound from what I have read on a thread here . I would like to sell it but need to know whats it is worth what should I look for how do I tell if it is a tube amp or not eltchi@aol.com