Adcom GFA-5500
Price trend
18 months of data shown — Listing Comps build richer history as transactions accumulate.
Sold or Listed Prices
19 market transactions via web search — not HiFi Registry sales.
Understanding the market
Half of recorded transactions fall between $439 and $569. The full range is tight — lowest to highest is only 1.8×, which suggests these units trade in a well-established band and condition moves price less than it does for many models.
Over the last twelve months this model averaged $471 across 10 recorded sales, 11% lower than the preceding twelve months.
What buyers should know
Ask when the unit was last serviced and whether the output devices are original. Bias and DC offset drift with age on solid-state amps. Confirm both channels have been tested under load, not just powered on.
This range reflects 19 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.