I am monitoring price for BSIDE L1 Light Meter Illuminance Meter Luxmeter and it is for $18.99 now (in Banggood). You can create price alert here, copy coupons and view price history. You probably want to know what is the best price?
BSIDE L1 Light Meter Digital Illuminance Meter Handheld Lux Tester LCD 0-200 /000 Lux/Fc Pocket Luxmeter Photometer Grow Plants
Latest price update (UTC time):
Banggood ($18.99)
Banggood warehouse is located in China. CouponsFromChina software could not find any coupon for this product in Banggood. Isn’t it too expensive? This price is higher than average price ($11.16) for this item.
Link: Banggood product page
Price: $18.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGGines
(these coupons are old, so probably won’t work)
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Do you need price history chart (for all/most countries) for BSIDE L1 Light Meter Illuminance Meter Luxmeter? 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)).