About a mile from me is a computer repair shop that has a lot more vintage audio equipment than computers. They owner is a very knowledgeable mid-60's onward audio equipment, mostly receivers, amps, speakers. I stopped by for a chat and saw a Marantz 4300 as well as Fisher 2/4 channel receiver( also CD-4, SQ, Vari-matrix) with joystick and I think he has a few Sansui quad receivers as well. I didn't ask condition or prices, so contact him directly at Computer World Sales and Service, 1360 New Haven Rd, Naugatuck, CT 06770 - +1 203 729-8228