errorinstruments KHarper
other
Not enough sold data for a typical price — 8 sales on record all-time.
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Not enough sold data for a typical price. 1 for sale, from €378.
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: 8 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 |
|---|---|---|---|---|---|
| 14 Jul 2026 | €290$325 as sold | excellent |  United States | Reverb | Details |
| 21 Jun 2026 | €294$330 as sold | excellent | United States | Reverb | Details |
| 11 Nov 2025 | €356$399 as sold | new | United States | Reverb | Details |
| 10 Nov 2025 | €314$353 as sold | mint |   Finland | Reverb | Details |
| 3 Dec 2025 | €311$349 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 Marketplaces do not publish the day a sale closed; each of these had sold by the time we recorded it, in October 2026. A price is what the listing last asked, converted at that day’s rate.
Show all 8 recorded sales
| Listed | Price | Condition | From | Platform | The listing |
|---|---|---|---|---|---|
| 19 Feb 2026 | €290$325 as sold | excellent | United States | Reverb | Details |
| 10 Feb 2026 | €290$325 as sold | excellent | United States | Reverb | Details |
| 11 Jan 2026 | €290$325 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 Marketplaces do not publish the day a sale closed; each of these had sold by the time we recorded it, in October 2026. A price is what the listing last asked, converted at that day’s rate.
Cheapest live: United States €378 · before shipping
8 recorded sales of the errorinstruments KHarper, too few to quote a typical used price. Cheapest live €378 before shipping. Figures computed 16 October 2026.