Wilson Audio X-1/Grand SLAMM
Price trend
23 months of data shown — Listing Comps build richer history as transactions accumulate.
Sold or Listed Prices
13 market transactions via web search — not HiFi Registry sales.
Understanding the market
Half of recorded transactions fall between $17,999 and $24,999. The full range runs 2.1× from lowest to highest, which is normal for used equipment where condition, included accessories, and service history vary between units.
Over the last twelve months this model averaged $15,933 across 3 recorded sales, 35% lower than the preceding twelve months.
What buyers should know
Inspect drivers and surrounds before anything else — foam surround rot is the most common failure on older floorstanders and is not always visible in photos. Ask whether the cabinets have been re-veneered, whether the crossovers have been recapped, and confirm both cabinets came from the same production run. Shipping is the other major cost: large floorstanders often need freight rather than parcel, and original cartons materially affect both safety and resale.
This range reflects 13 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.