About

kiban.alamone.net is a non-commercial price reference for the used-market prices of arcade game circuit boards (PCBs).

It gathers price data points from public auction and shop listings over time, so collectors can see what a given board has actually been bought and sold for — rather than relying on memory or a single asking price.

Where the data comes from

Every data point originates from a publicly visible listing — a Japanese auction marketplace (Yahoo Auctions), specialist arcade-PCB shops, and general used-goods retailers.

We also draw on the Internet Archive (Wayback Machine), which lets us recover historical asking prices from pages that have since changed.

Collection is deliberately conservative and ToS-respecting:

• We honor each site's robots.txt and terms.
• We do not scrape sites that disallow it, are login-walled, or use anti-bot protection. Data from those (e.g. eBay sold prices) is only ever added by hand.
• Requests are low-rate, identify themselves, and only read listing text — title, price, date.

How prices are read

Each listing is classified so different kinds of price aren't conflated:

• Asking vs. sold — shop list prices and auction Buy-It-Now are “asking”; only realized/closing prices count as “sold.” Live auction bids are excluded.
• Condition (working / untested / junk / damaged) and authenticity (original / copy / bootleg / conversion) are read from the listing text — only disclosed bootlegs/conversions can be detected.
• Region (Japan / export / USA / …) and ROM-only kits are flagged, and premium inclusions (system motherboard, control panel, shield case, original artwork) are tagged so a bundled board isn't compared against a bare one.

Coverage & caveats

• The game catalog is derived from the MAME arcade set, extended by hand for boards MAME doesn't cover (e.g. Taito Type X, Namco System 246/256). Modern PC-based platforms are generally out of scope, with per-title exceptions.
• Prices are stored in their original currency; other currencies shown on the site are converted at current rates for convenience, not the historical rate of sale.
• This site is run by one person, gathering data as best I can — asking prices are not guarantees of value, and classification from text is imperfect. Treat it as a guide, not an appraisal.

Contribute

Spot a board we don't track, or a data point we're missing? Use the request-a-game form. Corrections and sold-price submissions are welcome.

Contact: @alamone on X · alamone@gmail.com