Nordost Quantum QX4

Price trend

Sold or Listed Prices

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

Understanding the market

Half of recorded transactions fall between $899 and $1,200. The full observed range is unusually wide — the highest recorded price is 21.7× the lowest. A spread that wide usually means the recorded sales are not strictly comparable: different configurations or finishes, units sold for parts or with cosmetic damage, or listings where the model name is shared across more than one variant. Treat the middle range as the useful signal and the extremes as outliers worth investigating before you price against them.

What buyers should know

Confirm the unit is rated for your mains voltage and that the surge protection components have not already absorbed a fault — many conditioners continue to pass power after their protection stage has been spent.

This range reflects 22 recorded sales, compiled from publicly listed and completed sales elsewhere on the used market, not from HiFi Registry transactions. That is a large enough sample to price against with reasonable confidence, though condition and provenance still move individual units.