I have a near-perfect Technics SE-A3Mk2 amplifier that I'd like to sell...but I'm having trouble determining a realistic value. Cosmetically, it's not 100% perfect...I'd say 95% as there is a minor mar on the right panel. Functionally, it is 100% and, FWIW, I have the original box, terminal cover, and manual.
I see on eBay a few listings from +/-$3000 for units with obvious cosmetic issues all the way to $6,400 for one that is advertised as "near mint." That's a pretty broad range.