Good find! I encourage you. I never paid any attention to Technics [Matsushita] vintage amps until I collided with a non-working unit for a buck (100 yen). An SU-3500. I couldn't even wait to get home. I pulled the hood right there in the car. And I was not disappointed; I really liked what I saw. Nothing looked messed up — no signs of heat, charring or exploded caps. Very nice build quality indeed. And so it sits in my projects stack, and I can hardly wait. The more I play with these old Japanese, solid state units, the more I luv 'em. And I am beginning to think that the brand name is not nearly as significant as the individual unit. At 41 Watts/8 Ohms, the SU-3500 did not put out monster power, but members with even modestly efficient speakers need not hold back on that score when it comes to making a decision about a vintage amp. Keep us posted as to how it sounds. Recapping early 70's amp MAY freshen up the sound.