These units carry the "true" history and often a slightly gritier, more unpredictable sound due to aging components. Collectors value "early" serial numbers for their specific oscillator boards. Prices are high and maintenance is a constant requirement.
Many vintage units were modified over the decades (e.g., adding sync or external inputs). These can be useful but may decrease the "collector value" compared to a stock unit. Where to Buy buy minimoog
Test the resonance and cutoff; it should provide that signature smooth, creamy sweep without sounding thin. These units carry the "true" history and often