Alarm System is for 53.99 USD (in Banggood). Basically copy coupon, view price history or create e-mail price alert. Let’s see what best price is ATM.
Latest coupon and price update (UTC):
Banggood (53.99 USD)
Banggood warehouse is located in China. There is no active coupon in my database right now (for Banggood). Low/high price? According to my database, the average price is 60.31 USD and current price is 53.99 USD, so it’s probably a good price!
Link: Banggood product page
Price: 53.99 USD
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
There were country-specific coupon codes published on Couponsfromchina social channels and price alerts. Coupon price may vary by country, because there’re different VAT rates, shipping cost etc. There is a chance that some latest coupons are still working:
Coupon (22.3.2024, $44.99): BG24MARCA64
Item: GauTone PG103 Alarm System 433MHz
Countries: Poland
Old coupons (from the oldest to the newest): ADMITAD2212, BGSmart6, Couponsde7, MVC8SPRING, 8BGwbg2204, tRaDetRaCKeR, hoNEYbGdeAlS, BGJUNEGSG9, BG41db00, DealBGimpact, Cuponation9, BGffa986
(these coupons are old, so probably won’t work)
Aliexpress
Click here… to search for GauTone PG103 Alarm System 433MHz on Aliexpress
Here are coupons that you can use.
Price history and price alert
Price history (for all/most countries) for GauTone PG103 Alarm System 433MHz is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).