Basically copy coupon, view price history or create e-mail price alert. What is the best price?
Sensor type: G-M tube, Package weight: 160g, Voice source: real particle sound / alarm sound /mute, Sensitivity: 80cpm / μSV / Co-60, Material: ABS, Relative humidity: less than 95%, Energy range: 50kev-1.5mev less than 30%, Color: Black, Package size: 160x 60x 25mm, Relative intrinsic error: less than plus or minus 10%, Detectable species: Beta / Gamma / X-ray, The maximum dose equivalent rate: 99.99μsv/h, Item weight: 145g / 5.1ounce, Power supply: 3x AA battery (Not included) or USB cable (included), Alarm threshold: 0.5 (Adjustable), Item size: 116x 60x 25mm, The use of ambient temperature: -25 ~+45℃
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. There are no active coupons for this product, but the price is pretty low isn’t it?
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGGines, BGc66358, BG66bed0, BGbd1c87, BG1451a8, BGbfe9d0, BGa6306c, BG2678bd, BGTOOS729, BGBFDAY8, BGNEWYEAR8
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Do you need price history chart (for all/most countries) for BOSEAN FS-600 Counter Nuclear Radiation Detector? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).