About this site
What this is
Price Ledger measures the prices of games, PC hardware and exchange rates every day, ourselves, keeps them as time series, and writes a post only when something actually moves. Every number in every post comes from that observation log. We do not copy other sites and we do not write from memory.
How we measure
- Store pages and public rate feeds are read on a fixed schedule, the same way each time.
- Each item gets its own series. A post is considered only when an item has enough observations to say something about it.
- An item becomes a post when its current price departs clearly from its own recent median — not because a store calls it a sale.
That is why every post shows how many times and when we measured. "Measured 9×" means we checked that item nine times, and the nine raw values are published with the post as a JSON file anyone can inspect.
How posts are made
Posts include automatically assembled observation reports. Automated reports pass programmed checks, not individual human approval. These checks assess:
- numerical claims against recorded observations and citations
- the item has enough observations (games: 3+, exchange rates: 7+)
- prohibited wording and required affiliate disclosures
- the post does not duplicate an existing one
A report that fails is not published. Automated decisions and any human reviews are recorded separately.
Expired deals
Sales end. We do not delete the post; we mark an outdated snapshot historical, exclude it from our sitemap and request exclusion from search indexes, and keep the observed prices as a record.
Advertising and affiliate links
The site is intended to earn from advertising and affiliate commissions. These channels may not yet be enabled.
- Posts may contain affiliate links (for example to Green Man Gaming, Fanatical, Amazon, or Wise). Where they do, the post says so, and Amazon links carry the sentence: "As an Amazon Associate I earn from qualifying purchases."
- Advertising appears only when a publisher account has been configured.
- Affiliate relationships never decide what we write about or what price we report. Posts are triggered by movement in the observation data only.
Operator
Chanyang Lee
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