Akai AK73 Vintage Synthesizer - $500 (bernal heights)

The AX73 is a surprisingly good analog synthesizer that is still considered to be widely underrated and deserving of some recognition.
It's a six voice analog synthesizer with an almost identical architecture to Akai's AX60 keyboard.
It also came in a rack-mount form as the VX90.
It has one oscillator (VCO) per voice and allows for 3 playing modes: Poly mode uses one VCO per voice for six voice polyphonic pads, chords and strings.
Dual-VCO mode stacks 2 VCOs per voice for a thicker three-voice sound.
Unison mode stacks all six VCOs onto one monophonic voice for a screamin' lead! 500 obo