Koch Chromatic Harmonica - Key
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Has sold for €50 over 2015–2023, across 12 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 €116.
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 United StatesPrice history
Every recorded sale, one point each: 13 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 Oct 2025 | €36$40 as sold | new |  United States | Reverb | Details |
| 29 Jul 2023 | €35$40 as sold | mint | United States | Reverb | Details |
| 18 May 2022 | €71$80 as sold | excellent | United States | Reverb | Details |
| 25 Feb 2022 | €45$50 as sold | excellent | United States | Reverb | Details |
| 23 Jan 2022 | €61$69 as sold | mint | 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 Marketplaces do not publish the day a sale closed; each of these had sold by the time we recorded it, in October 2026.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 13 recorded sales
| Listed | Price | Condition | From | Platform | The listing |
|---|---|---|---|---|---|
| 23 Feb 2022 | €53$60 as sold | excellent | United States | Reverb | Details |
| 28 Jan 2022 | €49$55 as sold | excellent | United States | Reverb | Details |
| 26 Jun 2021 | €53$60 as sold | mint | United States | Reverb | Details |
| 22 May 2021 | €31$35 as sold | excellent | United States | Reverb | Details |
| 5 Apr 2021 | €79$89 as sold | excellent | United States | Reverb | Details |
| 7 Sept 2020 | €79$89 as sold | excellent | United States | Reverb | Details |
| 23 Oct 2019 | €45$50 as sold | good | United States | Reverb | Details |
| 15 Apr 2015 | €45$50 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 Marketplaces do not publish the day a sale closed; each of these had sold by the time we recorded it, in October 2026. A price is what the listing last asked, converted at that day’s rate.
Cheapest live: United States €116 · before shipping
12 recorded sales of the Koch Chromatic Harmonica - Key from 2015–2023, all-time around €50. Too few in the last two years to quote a typical used price. Cheapest live €116 before shipping. Figures computed 20 October 2026.