Deal Radar

Be first to message the seller: new second-hand listings from FB Marketplace and more. Free in your browser; Telegram on the plan.

Be the first to message the seller. Good deals on second-hand marketplaces are gone within minutes. Deal Radar watches the searches you care about and tells you about every new matching listing, so you can write to the seller while the listing is still fresh. FREE IN YOUR BROWSER • No account, no sign-up. Install and add 1 watch. • The extension checks every watch every 10 minutes while your browser is open. • New matches pop up as browser notifications. If your computer was off, one summary tells you what came in meanwhile. • Free mode keeps everything in your browser: watches, listings and alerts are not sent anywhere. FASTER WITH THE PLAN — €9 A MONTH FOR 5 WATCHES • The Deal Radar server checks most marketplaces every minute, even while your computer is off. • Sites that only work in a real browser (Facebook Marketplace and groups among them) are checked by your browser every 3 to 10 minutes. • Alerts go to Telegram on your phone. • Pay as a monthly Ko-fi membership; the extension switches to the plan by itself and moves your watches to the server. No payment details are entered in the extension. +5 watches for every €9 more. HOW A WATCH WORKS • Keywords that must appear, keywords that must not, a minimum and maximum price in your currency (CZK, EUR, PLN or USD). • Pick the sites of your country with one tap, plus Facebook Marketplace and the Facebook groups you joined. • A 7-day preview shows what the watch would have caught. • Vote Good or Junk on each alert to see how well a watch is tuned. WHERE IT LOOKS Second-hand marketplaces in 10 countries across Central Europe, Scandinavia, the US and Japan, plus Facebook Marketplace and your Facebook groups wherever you are. The full list is on radar.4xs.dev. Facebook searches run in one pinned background tab, in your normal browser session. Facebook group posts alert only you. One switch in the popup pauses all searches for 1 hour, 3 hours or until you start again. LANGUAGES English, Czech, German and Japanese. Deal Radar is an independent project by 4xs.dev, not affiliated with Meta or any marketplace it searches. **What's new in 2.3.1 (no new permissions, no manifest change except the version):** - Plan tab: honest speed copy — the plan pitch and the "Alert speed" row now say how often each site is checked ("usually a few minutes"), no longer "within a minute for Bazoš, Vinted & co." (EN/CS/DE/JA). - "From listing to alert" texts: "Within minutes" (was "1–3 min"), a busy site can take longer; "The listing is only minutes old".