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

Nearly 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.

A small share of data points is entered by hand from other verifiable records: in-store price tags, and sales contributed by community members — including some private sales shared with us. Every data point carries its source, so hand-entered records are always identifiable as such.

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 built from the MAME arcade set and extended by hand — for boards MAME doesn't cover (e.g. Taito Type X, Namco System 246/256) and, for the high-score reference, for modern PC-based arcade platforms such as exA-Arcadia and NESiCAxLive. Price tracking centers on PCBs, so those modern-platform titles are cataloged mainly for their high scores and reference details — a page simply omits the price section when there is no board market to track.
• 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.

Beyond prices

The site is growing into a broader reference for keeping this hardware alive: a directory of ROM hacks & mods with author attribution, a PCB repair-services directory matched to each board's era, reproduction-chip availability on game pages, a system-motherboard catalog, and per-title high-score records with a scorer directory (see below).

High scores: sources, permissions, and concept

The high-score section mirrors the STG Hall of Records (maintained by Plasmo), used with his explicit permission and credited on every score table. Each record carries its original citation — Gamest, Arcadia, Micom BASIC, JHA, or a linked post/video — because these records belong to the scorers and to the publications that tabulated them; we aggregate and cite, we do not adjudicate. No data is taken from other aggregation sites (such as high-scorer.net) — we regard those as valuable independent works and would only ever mirror one with its author's blessing.

The concept is not a replacement for any existing tabulation: it is a per-title reorganization of already-published records (current record + full history per category), integrated with the things this site already tracks — board prices, repair options, hardware. The scorer registry links published score names to scorer pages using publicly documented information only; if you are a scorer and want something corrected or removed, contact us and we will fix it.

Contribute

Spot a board we don't track? Use the request-a-game form. Have a sale we missed? The price-submission form takes sold prices with evidence. Corrections are always welcome.

Accessibility

We want the site to be usable by everyone, and aim to meet the Web Content Accessibility Guidelines (WCAG) 2.2 at level AA. Pages are checked with automated accessibility testing and by hand, in both the light and dark themes; the most recent review was in September 2026.

Some content comes from outside sources and may not meet every guideline: listing titles and photos as sellers posted them, and wiki and mod descriptions written by contributors. The price chart on each game page summarizes the listings table below it, which carries the same data as text.

If something on the site is hard to use with your browser, screen reader or other assistive technology, please email alamone@gmail.com with the page and what went wrong. We will do our best to fix it, or to provide the information another way.

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