New App Tracks Real Sold Prices for Vintage Synths and Used Gear

A community developer built a site to help figure out what gear actually sells for on the used market. It pulls sold listings from Reverb so you can see what people are actually paying, with filters for condition, location, date range, and more, and the developer posted it to the Elektronauts forum with feedback welcome from anyone who tries it.

The tool is called gear-book.app, and the core premise is simple but genuinely useful: rather than scrolling through asking prices on Reverb and guessing how much negotiation happened, you get confirmed sale data. If you want to know what a Prophet-5 Rev 3.3 in excellent condition sold for in the U.S. over the last six months, that's exactly the kind of query this is built for. Asking prices on vintage synths are notoriously optimistic; a JP-8000 or a CS-80 clone can sit listed for months at a price the market simply won't bear. Sold comps are the only number that actually matters when you're trying to buy or price your own kit.

The filters as described cover the three variables that most affect resale value in this space: condition, location, and date range. Condition matters enormously on vintage gear, where "good" and "excellent" can mean a several-hundred-dollar spread on something like an original Juno-106. Location affects both shipping costs and regional demand. Date range lets you see whether a piece's value has been climbing (Oberheim anything, lately) or softening. The Elektronauts post also flagged additional filters beyond those three, though the specifics weren't fully enumerated in the original post.

The tool aggregates sold data from marketplaces including Reverb and eBay, the two dominant platforms for used synth transactions outside of local Craigslist scores and private forum sales. That cross-platform view matters because sellers often price against one marketplace without accounting for what actually clears on the other.

Elektronauts is the forum for users of Elektron Music Machines, but its General Discussion section draws a wider crowd of hardware-focused producers and collectors well beyond the Elektron ecosystem, making it a logical place to surface a tool like this. The community that argues over whether an Analog Four is worth its current resale premium is exactly the community that needs better sold-price data.

gear-book.app is live now. For anyone who has ever lowballed a vintage piece and lost it, or worse, overpaid for one because they were working off stale asking prices, a tool anchored in confirmed transactions is the right direction.