Pennysku 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

  Per-store inventory: how Pennysku tells you where to drive

  When the SKU is at $0.06 nationwide but only 3 stores have stock — we tell you which 3. Plus aisle and bay.

• 2026-04-28

  Barcode scanner + drive routes: the on-the-ground flipper toolkit

  Two small features that turned Pennysku from a watchlist into a field tool.