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SITERLINK Smoke Detectors,UL217-9th Listed Smoke Alarms with Replaceable Battery,Photoelectric Sensor Smoke Detector with Test-Silence Button,Fire Detectors for Home,House,GS509A 4-Pack
AMAZON.COM
Price
$ 48.79
Last price was updated on: 9th Dec 2025, 08:37 PM
Pricing Analytics & Buying Assistance
Price Score:
Excellent!
Poor
Average
Good
Excellent
Current Price
$48.79
$38.39
Lowest
$89.99
Highest
Buying Advice:
Excellent! Buy now. 51% chance price goes up. Buy soon.
Excellent! Buy now. 51% chance price goes up. Buy soon.
Price History Benchmarks
Lowest Ever
$38.39
27th Nov 2025
Highest Ever
$89.99
4th Nov 2024
Average Price
$49.12
50 data points
Last 3M Low
$38.39
27th Nov 2025
Last 6M Low
$38.39
27th Nov 2025
Last 12M Low
$38.39
27th Nov 2025
Price History Chart
Product Variants
Product Technical Information
| Product Code | B0DK4XF3S4 |
|---|---|
| Market Place | amazon.com |
| Market Place Name | Amazon.com |
| Brand Name | SITERWELL |
| Rating | 4.5 ( 540 ratings ) |
| Category | Smoke Detectors & Fire Alarms |
| Manufacturer | SITERWELL ELECTRONICS CO.,LIMITED |
| Model Number | GS509A |
| Item Color | white |
| Item Size | 4 PACK |
| Item Dimensions | 3.93"D x 3.93"W x 1.38"H |
Frequently Asked Questions
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What is the lowest price ever for this product?The lowest price for SITERLINK Smoke DetectorsUL217-9th Listed Smoke Alarms with Replaceable BatteryPhotoelectric Sensor Smoke Detector with Test-Silence ButtonFire Detectors for HomeHouseGS509A 4-Pack was $38.39 on 27th Nov 2025. This is the best recorded deal so far.
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What is the highest price ever for this product?The highest price for SITERLINK Smoke DetectorsUL217-9th Listed Smoke Alarms with Replaceable BatteryPhotoelectric Sensor Smoke Detector with Test-Silence ButtonFire Detectors for HomeHouseGS509A 4-Pack was $89.99 on 4th Nov 2024. Prices have dropped since then.
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What is the average price of this product?The average price for SITERLINK Smoke DetectorsUL217-9th Listed Smoke Alarms with Replaceable BatteryPhotoelectric Sensor Smoke Detector with Test-Silence ButtonFire Detectors for HomeHouseGS509A 4-Pack is $49.12 (50 data points). This helps you compare current deals.
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What is the lowest price in the last 3 months?In the last 3 months, SITERLINK Smoke DetectorsUL217-9th Listed Smoke Alarms with Replaceable BatteryPhotoelectric Sensor Smoke Detector with Test-Silence ButtonFire Detectors for HomeHouseGS509A 4-Pack reached a low of $38.39 on 27th Nov 2025. Recent price trends may help you decide when to buy.
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Should I buy this product now?Buy now. The price is excellent compared to its history. 51% chance price goes up. Price may increase soon.