Smoke & Gas Detector Market Prices
Current market data for 18,629 smoke and gas detector listings.
What you'll usually pay
💡 Buying used saves about 29% here.
👉 In short easy summary
The best value is found in Wall Plug-In models, which are 42% below the market median. Radon detectors are the most expensive segment, trading at 61% above the median.
💚 Best value for your money
Price by power source
Why? Prices vary by installation type, with Wall Plug-In at 27.99 and Battery/Hardwired at 44.99.
Price by type
Why? Specialized equipment like Radon Detectors (77.5) costs significantly more than Carbon Monoxide Detectors (29.99).
Price by brand
Why? Pricing ranges from budget-friendly First Alert at 36.99 to premium Airthings at 79.95.
🛒 Some on sale right now
Common questions
What is the median price for a new smoke or gas detector?
The median price for new units is 49.48.
Are used detectors significantly cheaper?
Yes, the used median price is 34.99 compared to the market median of 47.99.
Which brand has the highest median price?
Airthings has the highest median price at 79.95.
How we got these numbers
Worked out from 200 live eBay listings (price range $18–$190, odd outliers ignored). These are asking prices, so use them as a guide. Last checked July 26, 2026.