Sequential Fourm 37-Key 4-Voice Polyphonic Synthesizer
keyboard
Worth around€600↓ 9% vs last quarter
Most sell between €558 and €634. 1 for sale right now from €687.
€558price it to sell fast
€600fair price
€634if you can wait
Why these numbers?
| Typical price | €600 | median of 12 sales, last 90 days |
| Middle half of sales | €558–€634 | 25th–75th percentile, same window |
| Sales on record | 24 | all-time, all platforms, in EUR |
| 90-day change | −9% | vs the 90 days before |
| Time to sell | — | only counted from listings we watch start to finish; not enough yet |
Outliers beyond 10× the product’s own median (bundles, parts, typos) are excluded before anything is computed. As of 2 September 2026. Full method
The Sequential Fourm 37-Key 4-Voice Polyphonic Synthesizer sold for a median of €600 over the last 90 days across 12 recorded sales on European marketplaces, with most examples landing between €558 and €634. There is 1 listing live right now across Reverb, from €687 asking. Figures computed 2 September 2026 by Doirado from cross-platform listing data, in EUR.
For sale right now
Best-priced first. Links go to the source listing.
Reverb