Synthrotek Quadrangle
keyboard
Has sold for €140 over 2018–2025, across 20 used sales. Too few in the last two years for a typical price today.
Doirado is free: no paywall, no sign-up. If this saved you from overpaying, you can chip in. Support Doirado
Not enough sold data for a typical price.
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.
Nothing live right now on the platforms we track.
Price history
Every recorded sale, one point each: 22 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 |
|---|---|---|---|---|---|
| 8 Sept 2025 | €143$160 as sold | mint |  United States | Reverb | Details |
| 20 Jan 2025 | €102$115 as sold | mint | United States | Reverb | Details |
| 13 Dec 2023 | €210$236 as sold | excellent | United States | Reverb | Details |
| 22 Jun 2021 | €156$175 as sold | excellent | United States | Reverb | Details |
| 11 Feb 2021 | €89$100 as sold | 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 Marketplaces do not publish the day a sale closed; each of these had sold by the time we recorded it, in October 2026. A price is what the listing last asked, converted at that day’s rate.
Show all 22 recorded sales
| Listed | Price | Condition | From | Platform | The listing |
|---|---|---|---|---|---|
| 19 Oct 2021 | €134$150 as sold | mint | United States | Reverb | Details |
| 26 Oct 2020 | €118$133 as sold | excellent | United States | Reverb | Details |
| 5 Oct 2020 | €125$140 as sold | excellent | United States | Reverb | Details |
| 2 Sept 2020 | €178$200 as sold | mint | United States | Reverb | Details |
| 7 Aug 2020 | €107$120 as sold | fair | United States | Reverb | Details |
| 18 Jul 2020 | €156$175 as sold | good | United States | Reverb | Details |
| 11 Jun 2020 | €111$125 as sold | excellent | United States | Reverb | Details |
| 6 Apr 2020 | €116$130 as sold | excellent | United States | Reverb | Details |
| 14 Jan 2020 | €147$165 as sold | excellent | United States | Reverb | Details |
| 19 Aug 2019 | €160$180 as sold | very good | United States | Reverb | Details |
| 28 May 2019 | €134$150 as sold | mint | United States | Reverb | Details |
| 21 May 2019 | €196$220 as sold | mint | United States | Reverb | Details |
| 30 Apr 2019 | €138$155 as sold | excellent | United States | Reverb | Details |
| 7 Dec 2018 | €156$175 as sold | mint | United States | Reverb | Details |
| 16 Oct 2018 | €125$140 as sold | excellent | United States | Reverb | Details |
| 6 Dec 2017 | €245$275 as sold | new | United States | Reverb | Details |
| 14 Oct 2017 | €245$275 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 October 2026. A price is what the listing last asked, converted at that day’s rate.
20 recorded sales of the Synthrotek Quadrangle from 2018–2025, all-time around €140. Too few in the last two years to quote a typical used price. Figures computed 18 October 2026.