Butch is hot right now............he would sign a door knob for you if you asked him to, so I honestly don't see why his signature on a call would make it worth more.
People are just going nuts over anything Butch for the last few years.
Don't get me wrong Mr. Butch " IS THE MAN " and calls he made by hand off of his jig will be worth big bucks some day.
Butch is Mr. Rich-n-Tone......... the other guys are RNT and they will never be anything close to what Mr. Butch is to the calling /call making world !!!