Terms of Service
Last updated: 2026-05-19.
What WatchSentry is
WatchSentry is a free Chrome extension that displays estimated fair-value data on Chrono24 listing pages. The displayed values are derived from public eBay Browse API listings filtered to comparable conditions, and are presented as informational estimates only. They are NOT appraisals, valuations, or financial advice.
No warranty
WatchSentry is provided "as is" with no warranty of accuracy, fitness for purpose, or availability. We expressly disclaim liability for any decision made based on data presented by this extension. Always verify fair-market-value with an independent professional before making a significant purchase.
Acceptable use
You may not use WatchSentry to scrape, copy, or redistribute the data we display. The extension is for personal, non-commercial use only. Automated or programmatic access to the underlying API is prohibited.
Changes
We may update these terms at any time. Continued use after an update constitutes acceptance.