Cwejman QMMF-4 Multi Mode Filter-Resonator
keyboard
Has sold for €2,350 over 2016–2026, across 54 used sales. Too few in the last two years for a typical price today.
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Not enough sold data for a typical price. 1 for sale, from €2,700.
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.
eBay GermanyPrice history
Every recorded sale, one point each: 56 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
| Listed | Price | Condition | From | Platform | The listing |
|---|---|---|---|---|---|
| 12 Jul 2026 | €1,847$2,150 as sold | excellent |  United States | Reverb | Details |
| 13 Oct 2025 | €2,034$2,369 as sold | excellent |   Netherlands | Reverb | Details |
| 5 May 2025 | €2,170$2,527 as sold | mint |  Poland | Reverb | Details |
| 18 Apr 2024 | €1,773$2,064 as sold | mint |  Germany | Reverb | Details |
| 15 Apr 2023 | €2,584$3,009 as sold | new |  Canada | 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 Marketplaces do not publish the day a sale closed; each of these had sold by the time we recorded it, in August 2026. A price is what the listing last asked, converted at that day’s rate.
Show the last 50 of 56 recorded sales
| Listed | Price | Condition | From | Platform | The listing |
|---|---|---|---|---|---|
| 17 Dec 2024 | €2,251$2,621 as sold | excellent |  Australia | Reverb | Details |
| 25 Mar 2024 | €2,104$2,450 as sold | mint | United States | Reverb | Details |
| 7 Mar 2024 | €1,890$2,200 as sold | excellent | United States | Reverb | Details |
| 11 Feb 2024 | €2,318$2,699 as sold | excellent | United States | Reverb | Details |
| 30 Nov 2023 | €2,200$2,561 as sold | mint | United States | Reverb | Details |
| 20 Sept 2023 | €2,233$2,600 as sold | mint | United States | Reverb | Details |
| 2 Jul 2023 | €2,469$2,875 as sold | excellent | United States | Reverb | Details |
| 19 May 2023 | €2,577$3,000 as sold | mint | United States | Reverb | Details |
| 15 Jan 2023 | €2,534$2,950 as sold | mint | United States | Reverb | Details |
| 13 Dec 2022 | €2,400$2,794 as sold | mint |  Sweden | Reverb | Details |
| 9 Dec 2022 | €2,295$2,672 as sold | mint | Netherlands | Reverb | Details |
| 3 Dec 2022 | €2,326$2,708 as sold | excellent | Canada | Reverb | Details |
| 6 Nov 2022 | €2,147$2,500 as sold | mint | United States | Reverb | Details |
| 20 Aug 2022 | €2,491$2,900 as sold | mint | United States | Reverb | Details |
| 25 Jun 2022 | €4,695$5,466 as sold | excellent |  Spain | Reverb | Details |
| 16 Jun 2022 | €2,147$2,500 as sold | mint |  Japan | Reverb | Details |
| 24 May 2022 | €3,129$3,643 as sold | mint | Poland | Reverb | Details |
| 12 May 2022 | €2,577$3,000 as sold | mint | United States | Reverb | Details |
| 7 May 2022 | €2,572$2,995 as sold | excellent | United States | Reverb | Details |
| 30 Mar 2022 | €2,834$3,300 as sold | mint | United States | Reverb | Details |
| 14 Feb 2022 | €3,078$3,583 as sold | new | Germany | Reverb | Details |
| 5 Jan 2022 | €3,436$4,000 as sold | mint | United States | Reverb | Details |
| 7 Dec 2021 | €6,260$7,288 as sold | mint |  Norway | Reverb | Details |
| 3 Dec 2021 | €2,146$2,499 as sold | excellent | United States | Reverb | Details |
| 16 Nov 2021 | €2,812$3,274 as sold | excellent | Netherlands | Reverb | Details |
| 24 Sept 2021 | €6,442$7,500 as sold | excellent | United States | Reverb | Details |
| 8 Aug 2021 | €3,436$4,000 as sold | mint | United States | Reverb | Details |
| 1 Mar 2021 | €2,739$3,189 as sold | excellent |  United Kingdom | Reverb | Details |
| 16 Dec 2020 | €3,006$3,500 as sold | excellent | United States | Reverb | Details |
| 24 Sept 2020 | €2,233$2,600 as sold | excellent | United States | Reverb | Details |
| 29 Jul 2020 | €2,319$2,700 as sold | mint | United States | Reverb | Details |
| 31 May 2020 | €2,276$2,650 as sold | mint | United States | Reverb | Details |
| 25 May 2020 | €2,233$2,600 as sold | very good | Sweden | Reverb | Details |
| 20 Jan 2020 | €3,078$3,583 as sold | mint | Germany | Reverb | Details |
| 17 Jan 2020 | €2,705$3,150 as sold | excellent | United States | Reverb | Details |
| 15 Jan 2020 | €2,973$3,462 as sold | excellent | Germany | Reverb | Details |
| 11 Dec 2019 | €2,748$3,200 as sold | mint | United States | Reverb | Details |
| 20 Oct 2019 | €2,435$2,835 as sold | mint | United Kingdom | Reverb | Details |
| 17 Oct 2019 | €2,608$3,037 as sold | mint | Norway | Reverb | Details |
| 14 Aug 2019 | €1,799$2,095 as sold | excellent | United States | Reverb | Details |
| 13 Jun 2019 | €2,491$2,900 as sold | excellent | United States | Reverb | Details |
| 10 Jun 2019 | €2,147$2,500 as sold | very good | United States | Reverb | Details |
| 24 May 2019 | €1,890$2,200 as sold | very good | United States | Reverb | Details |
| 2 Apr 2019 | €1,503$1,750 as sold | excellent | United States | Reverb | Details |
| 10 Mar 2019 | €3,436$4,000 as sold | excellent | 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. A price is what the listing last asked, converted at that day’s rate.
Cheapest live: 
Greece €2,700 · before shipping
54 recorded sales of the Cwejman QMMF-4 Multi Mode Filter-Resonator from 2016–2026, all-time around €2,350. Too few in the last two years to quote a typical used price. Cheapest live €2,700 before shipping. Figures computed 18 October 2026.