Alarm Systems Price Analysis
Current market data for 6,721 alarm system listings.
What you'll usually pay
💡 Buying used saves about 16% here.
👉 In short easy summary
Value is found in basic Wi-Fi and battery-powered units, which trade 15% to 32% below the market median. Premium pricing is driven by GSM connectivity (+142%) and touch screen interfaces (+71%).
💚 Best value for your money
Price by features
Why? Prices range from basic battery units at 40 to high-end touch screens at 99.99.
Price by items included
Why? Costs vary from simple door sensors at 31.85 to full keypads at 78.52.
Price by connectivity
Why? GSM systems command a premium at 141.88 compared to Wi-Fi at 42.74.
Price by brand
Why? Homsecur is the most expensive at 159.12, while GE is the most affordable at 29.
🛒 Some on sale right now
Common questions
What is the price difference between new and used alarm systems?
New systems have a median price of 56.65, while used systems are lower at 47.74.
Which connectivity option is the most expensive?
GSM connectivity is the most expensive option with a median price of 141.88.
How do basic sensors compare in price to keypads?
Door sensors have a median price of 31.85, whereas keypads are significantly higher at 78.52.
How we got these numbers
Worked out from 200 live eBay listings (price range $15–$199, odd outliers ignored). These are asking prices, so use them as a guide. Last checked July 26, 2026.