I currently own what I believe to be a 1969/70 Marshall Plexi Super Tremolo 100 Watt Amp (Serial # ST/A 10096) which belonged to former Misfits guitarist Bobby Steele, and used at some Misfits live dates and recording sessions. I purchased Bobby’s entire collection including all his guitars, amps, memorabilia, etc. He mentioned that Marshall amp was modified at Dennis Electronics to use 7027 output tubes, and remodified at Tubesville to move the master volume to the front in 1990. I’m currently trying to sell this amp, and my question to forum members is - based on the history and former owner, would you this add any additional value if you were not a Misfits fan? Any thoughts on value as modified?