Note: links to listings are affiliate links for which the site may be compensated.

via
this auction
"13 module Formant modular synthesizer.
The modules are:
3 VCO,s with 5 waveforms each.
1 VCF with 3 band filter.
1 24db VCF with HP/LP and db switch.
1 RFM module
1 mixer output module.
1 noise generator
1 LFO with 12 waveform outputs!
2 ADRS's
1 VCA
1 module is empty

Item is in a case with power unit inside, no keyboard available.
The VCO's, filters, output mixer, noise and LFO are tested for output signal and all give waveform outputs and correct filter response.
I do not have a CV/Gate keyboard to test the ADSR's and VCA but item was purchased as "working" so i am convinced they are ok.
Since it is a old formant some pots are scratchy and it could use some TLC but nothing serious.
Item is sold as "broken" due to the fact it is a Formant DIY synth but this only a formality, i would not be put off when wanting to own this synth.
I suggest future buyer is a DIY modular enthusiastic, one that knows what the Formant heritage is."