I run a crawler that re-reads public Vinted shelves in France, Germany, Spain, Italy and Portugal about every 30 minutes and records which listings disappear. On 5 October 2026 the database held 14,676,854 listings. September was the first full month of departure tracking, so I published it as a dataset: the Vinted Demand Index, October 2026 . One word matters before the numbers. I call them observed departures , not sales. A listing can leave the shelf because someone bought it, but also b...