ARP Little Brother Analog Synthesizer Expander Module
keyboard
Has sold for €730 over 2022–2025, across 8 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. 2 for sale, from €800.
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 States
Price history
Every recorded sale, one point each: 10 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 |
|---|---|---|---|---|---|
| 10 Sept 2025 | €572$666 as sold | parts |  United States | Reverb | Details |
| 13 Aug 2025 | €752$875 as sold | very good | United States | Reverb | Details |
| 20 May 2025 | €1,245$1,450 as sold | very good | United States | Reverb | Details |
| 22 Jul 2024 | €904$1,053 as sold | excellent |  Canada | Reverb | Details |
| 13 Jul 2024 | €514$599 as sold | parts | 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 Marketplaces do not publish the day a sale closed; each of these had sold by the time we recorded it, in August 2026. A price is what the listing last asked, converted at that day’s rate.
Show all 10 recorded sales
| Listed | Price | Condition | From | Platform | The listing |
|---|---|---|---|---|---|
| 21 Feb 2025 | €739$860 as sold | very good | United States | Reverb | Details |
| 18 Feb 2024 | €687$800 as sold | very good | United States | Reverb | Details |
| 23 Feb 2023 | €172$200 as sold | good | United States | Reverb | Details |
| 7 Jan 2023 | €447$520 as sold | good | United States | Reverb | Details |
| 28 Nov 2022 | €730$850 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 Marketplaces do not publish the day a sale closed; each of these had sold by the time we recorded it, in August 2026. A price is what the listing last asked, converted at that day’s rate.
Cheapest live: United States €800 · before shipping
8 recorded sales of the ARP Little Brother Analog Synthesizer Expander Module from 2022–2025, all-time around €730. Too few in the last two years to quote a typical used price. Cheapest live €800 before shipping. Figures computed 19 October 2026.