Sequential Fourm 37-Key 4-Voice Polyphonic Synthesizer
keyboard
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Why this number?
The typical used price is the median of 18 used sales observed in the last 6 months, with outliers removed and the figure rounded. An observed sale is often the last asking price rather than a confirmed hammer price.
| Typical used price | €600 | median sold, rounded |
| Most sold between | €570–€660 | 25th to 75th percentile, same window |
| Window | last 6 months | the tightest of 90 days, 6 months and 24 months with 8 used sales |
| Sample | 18 used sales | thin data, treat as a rough guide |
| By condition | same as typical | excellent, median of 17 sales, same window |
| Time to sell | — | only counted from listings we watch start to finish; not enough yet |
| Live asks | €711 | typical ask across 27 listings, 19% above typical used |
| Outliers | dropped | beyond 10× the product’s own median: bundles, parts, typos |
| All-time | €640 | 27 used sales, 2025–2026; not used for deals |
| Sales on record | 40 | all-time, all platforms |
| Closest new | €739 | Sequential Fourm at Thomann; a relative’s price, not this model’s |
Typical prices are rounded (to 5 / 10 / 50 / 100 by size, in whichever currency you read); asks and the chart are exact. As of 19 October 2026. Full method, including what each badge means
For sale right now
The best-priced as cards, a row of them; every other ad as a line, by ask. Each ask is the seller’s own number; the platform’s mark opens the listing. Each one says when we last confirmed it at its source: the price and availability are from that visit, so check the marketplace before you go.
Reverb
21 more live · €699–€990 · typical ask €711 · most of these are new asks against a used typical
- €69917% over typicalexcellent ·
France · Reverb · confirmed 43 h ago - €70017% over typicalnew ·
Germany · Reverb · confirmed 43 h ago - €71119% over typicalnew ·
United States · Reverb · confirmed 43 h ago - €71119% over typicalnew · United States · Reverb · confirmed 43 h ago
- €71119% over typicalnew · United States · Reverb · confirmed 43 h ago
- €71119% over typicalnew · United States · Reverb · confirmed 43 h ago
- €71119% over typicalnew · United States · Reverb · confirmed 5 days ago
- €71119% over typicalnew · United States · Reverb · confirmed 43 h ago
- €71119% over typicalnew · United States · Reverb · confirmed 43 h ago
- €71119% over typicalnew · United States · Reverb · confirmed 43 h ago
11 more · €714–€990 · United States, France, Canada, Italy and 1 more
- €71419% over typicalnew · United States · eBay United States · confirmed 6 days ago
- €71519% over typicalnew · France · Reverb · confirmed 43 h ago
- €72020% over typicalexcellent ·
Canada · Reverb · confirmed 43 h ago - €72020% over typicalnew · United States · Reverb · confirmed 43 h ago
- €74624% over typicalnew · United States · Reverb · confirmed 43 h ago
- €76227% over typicalexcellent · France · Reverb · confirmed 10 h ago
- €78932% over typicalgood · United States · eBay United States · confirmed 34 h ago
- €84341% over typicalnew ·
United Kingdom · Reverb · confirmed 43 h ago - €85142% over typicalnew · Canada · Reverb · confirmed 43 h ago
- €86244% over typicalnew ·
Italy · Reverb · confirmed 43 h ago - €99065% over typicalexcellent · Italy · Reverb · confirmed 43 h ago
Price history
Every recorded sale, one point each: 40 of them, placed by the day the ad went up. Too few sales to draw a trend through them without inventing one, so the points speak for themselves. Condition is mixed, so some of the spread is a mint against a fair rather than the market moving.
Recent sales by listing date
18 used sales · last 6 months · middle half €570–€660 · thin
| Listed | Price | Condition | From | Platform | The listing |
|---|---|---|---|---|---|
| 12 Oct 2026 | €533$600 as sold | excellent | United States | Reverb | Details |
| 7 Aug 2026 | €506$589 as sold | excellent | United States | Reverb | Details |
| 19 Jul 2026 | €730$850 as sold | very good | France | Reverb | Details |
| 17 Jul 2026 | €600$699 as sold | mint | United States | Reverb | Details |
| 19 Jun 2026 | €983$1,104 as sold | new | United Kingdom | Reverb | Details |
A date is the day the ad went up. Marketplaces do not publish the day a sale closed; each of these had sold by the time we recorded it, in August 2026 and October 2026. A price is what the listing last asked, converted at that day’s rate.
Show all 40 recorded sales
| Listed | Price | Condition | From | Platform | The listing |
|---|---|---|---|---|---|
| 3 Aug 2026 | €651$730 as sold | excellent | United States | Reverb | Details |
| 28 Jul 2026 | €558$650 as sold | excellent | United States | Reverb | Details |
| 23 Jul 2026 | €623$725 as sold | excellent | United States | Reverb | Details |
| 16 Jul 2026 | €514$599 as sold | excellent | United States | Reverb | Details |
| 10 Jul 2026 | €557$649 as sold | excellent | United States | Reverb | Details |
| 3 Jul 2026 | €600$699 as sold | excellent | United States | Reverb | Details |
| 3 Jul 2026 | €600$699 as sold | excellent | United States | Reverb | Details |
| 23 Jun 2026 | €597$695 as sold | excellent | United States | Reverb | Details |
| 15 Jun 2026 | €600$699 as sold | excellent | United States | Reverb | Details |
| 14 Jun 2026 | €670$780 as sold | excellent | United States | Reverb | Details |
| 14 Jun 2026 | €687$800 as sold | excellent | United States | Reverb | Details |
| 2 Jun 2026 | €683$795 as sold | excellent | United States | Reverb | Details |
| 30 May 2026 | €601$700 as sold | excellent | United States | Reverb | Details |
| 21 May 2026 | €686$799 as sold | excellent | United States | Reverb | Details |
| 3 May 2026 | €618$720 as sold | excellent | United States | Reverb | Details |
| 28 Apr 2026 | €660$769 as sold | excellent | United States | Reverb | Details |
| 15 Apr 2026 | €840$978 as sold | new | Canada | Reverb | Details |
| 7 Apr 2026 | €684$796 as sold | excellent | United States | Reverb | Details |
| 30 Mar 2026 | €644$750 as sold | excellent | United States | Reverb | Details |
| 17 Mar 2026 | €694$808 as sold | excellent | Italy | Reverb | Details |
| 4 Feb 2026 | €751$875 as sold | excellent | France | Reverb | Details |
| 29 Jan 2026 | €687$800 as sold | excellent | United States | Reverb | Details |
| 29 Jan 2026 | €644$750 as sold | excellent | United States | Reverb | Details |
| 27 Jan 2026 | €764$888 as sold | excellent | United States | Reverb | Details |
| 23 Dec 2025 | €687$800 as sold | new | United States | Reverb | Details |
| 17 Dec 2025 | €627$704 as sold | excellent | United States | Reverb | Details |
| 16 Dec 2025 | €760$853 as sold | mint | United States | Reverb | Details |
| 15 Dec 2025 | €683$795 as sold | excellent | United States | Reverb | Details |
| 12 Dec 2025 | €791$920 as sold | excellent | United Kingdom | Reverb | Details |
| 16 Oct 2025 | €687$800 as sold | new | United States | Reverb | Details |
| 23 Sept 2025 | €721$840 as sold | new | United States | Reverb | Details |
| 23 Sept 2025 | €687$800 as sold | new | United States | Reverb | Details |
| 23 Sept 2025 | €696$810 as sold | new | United States | Reverb | Details |
| 23 Sept 2025 | €644$750 as sold | new | United States | Reverb | Details |
| 23 Sept 2025 | €687$800 as sold | new | United States | Reverb | Details |
A date is the day the ad went up. Marketplaces do not publish the day a sale closed; each of these had sold by the time we recorded it, in August 2026 and October 2026. A price is what the listing last asked, converted at that day’s rate.
Where it’s cheapest right now
What sellers are asking today, by country. Asking prices, not sales; shipping, fees and any customs or import VAT between you and the seller are not included.
| Country | Live | Median ask | Cheapest ask | Cheapest vs typical |
|---|---|---|---|---|
| United States | 17 | €711 | €542 | €58 under (10%) |
| France | 4 | €707 | €695 | 16% over typical |
| Germany | 1 | €700 | €700 | 17% over typical |
| Canada | 2 | €786 | €720 | 20% over typical |
| United Kingdom | 1 | €843 | €843 | 41% over typical |
| Italy | 2 | €926 | €862 | 44% over typical |
In one paragraph
The page's figures as one paragraph, assembled for quoting; not written by hand.
The Sequential Fourm 37-Key 4-Voice Polyphonic Synthesizer sold for a median of €600 over the last 6 months across 18 recorded sales, with most examples landing between €570 and €660. Sold new in the same family, the Sequential Fourm, costs €739 at Thomann (read 29 August 2026). There are 27 listings live right now across Reverb, eBay United States, from €542 asking, a median ask 19% over the sale median. Figures computed 19 October 2026 by Doirado from cross-platform listing data.