E-MU Systems PK-6 Proteus Keys 61-Key 64-Voice Sampler Module
keyboard
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Why this number?
The typical used price is the median of 10 used sales observed in the last 24 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 | €310 | median sold, rounded |
| Most sold between | €260–€380 | 25th to 75th percentile, same window |
| Window | last 24 months | the tightest of 90 days, 6 months and 24 months with 8 used sales |
| Sample | 10 used sales | thin data, treat as a rough guide |
| Time to sell | — | only counted from listings we watch start to finish; not enough yet |
| Outliers | dropped | beyond 10× the product’s own median: bundles, parts, typos |
| All-time | €270 | 46 used sales, 2016–2026; not used for deals |
| Sales on record | 47 | all-time, all platforms |
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.
ReverbPrice history
Every recorded sale, one point each: 47 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
10 used sales · last 24 months · middle half €260–€380 · thin
| Listed | Price | Condition | From | Platform | The listing |
|---|---|---|---|---|---|
| 24 Aug 2026 | €423$475 as sold | excellent |  United States | Reverb | Details |
| 8 Mar 2026 | €386$449 as sold | very good | United States | Reverb | Details |
| 11 Feb 2026 | €258$300 as sold | good | United States | Reverb | Details |
| 5 Sept 2025 | €322$375 as sold | very good | United States | Reverb | Details |
| 28 Jul 2025 | €409$475 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 Marketplaces do not publish the day a sale closed; each of these had sold by the time we recorded it, in August 2026 and October 2026. A price is what the listing last asked, converted at that day’s rate.
Show all 47 recorded sales
| Listed | Price | Condition | From | Platform | The listing |
|---|---|---|---|---|---|
| 4 Feb 2026 | €258$300 as sold | good | United States | Reverb | Details |
| 5 May 2025 | €301$350 as sold | very good | United States | Reverb | Details |
| 11 Apr 2025 | €233$270 as sold | good | United States | Reverb | Details |
| 18 Nov 2024 | €258$300 as sold | good | United States | Reverb | Details |
| 1 Nov 2024 | €352$410 as sold | fair |  United Kingdom | Reverb | Details |
| 20 Sept 2024 | €365$425 as sold | mint | United States | Reverb | Details |
| 19 Sept 2024 | €344$400 as sold | good | United States | Reverb | Details |
| 9 Sept 2024 | €341$397 as sold | very good | United Kingdom | Reverb | Details |
| 1 May 2024 | €429$499 as sold | excellent | United States | Reverb | Details |
| 21 Dec 2023 | €299$348 as sold | excellent | United States | Reverb | Details |
| 16 Dec 2023 | €308$359 as sold | fair | United States | Reverb | Details |
| 6 Jun 2023 | €229$265 as sold | very good | United States | Reverb | Details |
| 12 May 2023 | €218$253 as sold | good | United States | Reverb | Details |
| 12 Jan 2023 | €215$250 as sold | very good | United States | Reverb | Details |
| 11 Jan 2023 | €343$399 as sold | very good | United States | Reverb | Details |
| 29 Oct 2022 | €258$299 as sold | very good | United States | Reverb | Details |
| 22 Jun 2022 | €259$300 as sold | good | United States | Reverb | Details |
| 17 May 2022 | €344$400 as sold | excellent | United States | Reverb | Details |
| 17 Jan 2022 | €344$400 as sold | excellent | United States | Reverb | Details |
| 16 Dec 2021 | €383$445 as sold | very good | United States | Reverb | Details |
| 18 Jun 2021 | €178$200 as sold | very good | United States | Reverb | Details |
| 10 Jun 2021 | €334$375 as sold | good | United States | Reverb | Details |
| 9 Jun 2021 | €299$335 as sold | good | United States | Reverb | Details |
| 27 Apr 2021 | €355$399 as sold | good | United States | Reverb | Details |
| 11 Mar 2021 | €430$500 as sold | very good | United States | Reverb | Details |
| 2 Mar 2021 | €204$229 as sold | good | United States | Reverb | Details |
| 23 Feb 2021 | €134$150 as sold | good | United States | Reverb | Details |
| 2 Dec 2020 | €272$305 as sold | excellent | United States | Reverb | Details |
| 17 Jul 2020 | €178$200 as sold | excellent | United States | Reverb | Details |
| 4 May 2020 | €223$250 as sold | good | United States | Reverb | Details |
| 20 Mar 2020 | €356$400 as sold | excellent | United States | Reverb | Details |
| 30 Nov 2019 | €223$250 as sold | very good | — | Reverb | Details |
| 19 Jun 2019 | €116$130 as sold | parts | United States | Reverb | Details |
| 16 Apr 2019 | €267$300 as sold | very good | United States | Reverb | Details |
| 7 Apr 2019 | €267$300 as sold | good |   Portugal | Reverb | Details |
| 26 Feb 2019 | €178$199 as sold | excellent | United States | Reverb | Details |
| 31 Jan 2019 | €179$200 as sold | excellent | United States | Reverb | Details |
| 11 Dec 2018 | €223$250 as sold | good | United States | Reverb | Details |
| 23 Apr 2018 | €223$250 as sold | very good | United States | Reverb | Details |
| 3 Jan 2018 | €379$425 as sold | good | United States | Reverb | Details |
| 6 Oct 2017 | €258$300 as sold | good | United States | Reverb | Details |
| 7 Feb 2016 | €223$250 as sold | very good | 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.
Cheapest live: United States €401 · before shipping
In one paragraph
The page's figures as one paragraph, assembled for quoting; not written by hand.
The E-MU Systems PK-6 Proteus Keys 61-Key 64-Voice Sampler Module sold for a median of €310 over the last 24 months across 10 recorded sales, with most examples landing between €260 and €380. There is 1 listing live right now across Reverb, from €401 asking. Figures computed 19 October 2026 by Doirado from cross-platform listing data.