Priceglitch blog

Notes from the team. Glitch retros, scraper engineering, the occasional rant.

• 2026-04-28

  How Glitchfinder catches a price error

  Anatomy of a glitch: from the moment a retailer mistypes a price to the moment a Discord message lands in your phone.

• 2026-04-28

  The 5% floor: why we reject scam-priced rows

  Why a $17.99 ASUS laptop never makes it into your alerts, even though the scraper said so.

• 2026-04-28

  The $17.99 laptop: how parse-guard saves you from scam alerts

  A real-world look at one of the noisiest failure modes in retail price monitoring, and the 5%-of-list floor that fixed it.

• 2026-04-28

  When parse-guard intentionally lets a deal through

  The 5%-of-list floor doesn't apply when there's no list price — and that's where the best Home Depot mistakes live.