Casio CT-640 Casiotone 61-Key Synthesizer
keyboard
Has sold for €80 over 2018–2024, across 17 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.
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: 17 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 |
|---|---|---|---|---|---|
| 29 Oct 2024 | €52$60 as sold | very good |  United States | Reverb | Details |
| 23 Jul 2024 | €85$99 as sold | good | United States | Reverb | Details |
| 14 Apr 2024 | €120$140 as sold | excellent | United States | Reverb | Details |
| 26 Jul 2022 | €59$69 as sold | very good | United States | Reverb | Details |
| 22 Apr 2022 | €39$45 as sold | fair | 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 Marketplaces do not publish the day a sale closed; each of these had sold by the time we recorded it, in August 2026 and October 2026.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 17 recorded sales
| Listed | Price | Condition | From | Platform | The listing |
|---|---|---|---|---|---|
| 8 Jan 2024 | €85$99 as sold | good | United States | Reverb | Details |
| 2 Jun 2022 | €129$150 as sold | very good | United States | Reverb | Details |
| 27 Feb 2022 | €93$108 as sold | good |   Netherlands | Reverb | Details |
| 17 Feb 2021 | €51$59 as sold | good | United States | Reverb | Details |
| 6 Feb 2021 | €86$100 as sold | very good | United States | Reverb | Details |
| 7 Jan 2021 | €82$95 as sold | excellent | United States | Reverb | Details |
| 7 Jan 2021 | €86$100 as sold | very good | United States | Reverb | Details |
| 13 Dec 2020 | €68$79 as sold | very good | United States | Reverb | Details |
| 14 Aug 2020 | €69$80 as sold | good | United States | Reverb | Details |
| 12 Aug 2020 | €86$100 as sold | very good | United States | Reverb | Details |
| 6 Nov 2018 | €36$40 as sold | fair | United States | Reverb | Details |
| 16 Apr 2018 | €80$90 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.
17 recorded sales of the Casio CT-640 Casiotone 61-Key Synthesizer from 2018–2024, all-time around €80. Too few in the last two years to quote a typical used price. Figures computed 20 October 2026.