Aliexpress
Click here… to search for Convoy C8 LG 5W UV Flashlight on Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (27.69 USD): BGC8UV
Coupon (28.28 USD): BGCONV
Coupon (29.28 USD): BGTORCH
(CouponsFromChina.com tip: apply it in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BGBFCR41
(these coupons are old, so probably won’t work)
Price history and price alert
Here is price history (for all/most countries) for Convoy C8 LG 5W UV Flashlight.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).