ADC 660

Sold or Listed Prices

8 market transactions via web search — not HiFi Registry sales.

Understanding the market

Half of recorded transactions fall between $13 and $14. The full range is tight — lowest to highest is only 1.3×, which suggests these units trade in a well-established band and condition moves price less than it does for many models.

What buyers should know

Hours of use is the single most important figure and the hardest to verify. Ask directly for the estimate, whether the stylus has been inspected under magnification, and whether a retip or rebuild has been performed and by whom.

This range reflects 8 recorded sales, compiled from publicly listed and completed sales elsewhere on the used market, not from HiFi Registry transactions. That is enough to establish a working range, but not enough to be precise — treat it as a guide rather than an appraisal.